unable to connect to msm messenger

  runnerblade 18:39 07 Apr 06

hi guys long time no post. i have just installed a new adsl ethernet modum router and now unable to connect to msm messenger.
have checked all setting cables etc they seem fine.
i can get on internet via aol on both pcs i have but get a busy sorry unable to connect you please try later message.
also numbers 80048820 come up in the message box.
have tried the trouble shooter on msn tools and get all green ticks.the first time however it come up with a yellow symbol against the host box and a message about fire wall settings
thr router is a addon arm8100 adsl 4 port router
i connect via aol

  howard63 20:37 07 Apr 06

I have heard of a similar problem when networked via peer to peer and the rate of transfer is set too high this stops some sites. I had this problem about a year ago and the solution is to alter a setting I will try and find it.

  howard63 20:57 07 Apr 06

it was the mtu value here is how to deal with it if this is your problem.
You might not be able to browse some Web sites or to send e-mail messages that contain attachments from an Internet Connection Sharing client computer if your outbound connection is through a Windows XP-based Internet Connection Sharing host computer that uses Point-to-Point Protocol over Ethernet (PPPoE).
This issue may occur if the Windows XP-based Internet Connection Sharing host computer uses a smaller Maximum Transmission Unit (MTU) size on the public interface (the PPPoE connection to the Internet) than it uses on the private interface (the Ethernet connection to the Internet Connection Sharing client). If a packet is larger than the MTU size on the public interface, the client sends an Internet Control Message Protocol (ICMP) error to the external server to request that the server negotiate the TCP Maximum Segment Size (MSS). However, this message may be blocked by some firewalls. When this occurs, the packet is dropped.
To resolve this problem, install Windows XP Service Pack 1 (SP1) on your Internet Connection Sharing host computer. Internet Connection Sharing has been updated in Windows XP SP1 to work around this issue by using a process that is named MSS clamping. MSS clamping causes Internet Connection Sharing to set the MSS value low enough to match the external interface.
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To temporarily work around this problem, lower the MTU size on the internal Internet Connection Sharing client computers to 1490.

  howard63 20:57 07 Apr 06

NOTE: Use this temporary workaround only in cases in which a Windows XP-based computer is both an Internet Connection Sharing host (or gateway) and is connected to the Internet by using PPPoE.

To modify the MTU on the internal Internet Connection Sharing client computers, follow these steps.

To Identify the correct MTU size: 1. Start a command prompt, and then use the Ipconfig utility to determine the default gateway of the Internet Connection Sharing server.
2. At a command prompt on a client, type the following line, and then press ENTER:
ping -f -l MTU_size default_gateway_IP_address
Start with an MTU size of 1,490.
3. If you receive an error message that indicates that the message must be fragmented, repeat step 2 by using a smaller MTU size. Repeat this process until the ping command succeeds.
After you determine the largest supported MTU size, follow these steps to manually set the MTU on the Internet Connection Sharing client computer or computers: 1. Click Start, point to Control Panel, point to Network and Internet Connections, and then click the Network Connections folder.
2. If the Network Connections folder contains more than one network connection, check the IP address for each network connection to determine which is the Internet connection.

To check the IP address for a network connection, double-click the Network Connection icon, click the Support tab, and then note the IP address.

The connection with an IP address that starts with 192.168 is the Internet network connection. Note the name of the Internet connection (for example, "Local Area Connection 2").
3. Start Registry Editor.
4. Locate and then click the following key in the registry, where AdapterIDNumber is a hexadecimal number:
5. In the Connection key, check the Name value to determine if it matches the name of the Internet connection that you found in step 2.

If the Name value matches the name of the Internet connection, note the name of the {AdapterIDNumber} key.

If the Name value does not match the name of the Internet connection, repeat this step to check the Name value in the next {AdapterIDNumber}\Connection key in the registry.
6. Locate and then click the following key in the registry, where AdapterIDNumber is the hexadecimal ID number of the Internet connection that you noted in step 5:
7. On the Edit menu, click Add Value, and then add the following registry value, where MaxMTUSize is the maximum supported MTU size that you discovered earlier in the Ping tests:
Value name: MTU
Data type: REG_DWORD
Radix: Decimal
Value data: MaxMTUSize
8. Quit Registry Editor.
NOTE: If you still experience problems when you visit some Web sites, you may have to change the MTU value setting to a lower number. Reduce the MTU value setting in increments of 10 until the issue is resolved.

For additional information about how to manually set the MTU size, click the following article number to view the article in the Microsoft Knowledge Base:
314053 (click here) TCP/IP and NBT Configuration Parameters for Windows XP
PPPoE is described in Request for Comments ( RFC) document 2516. Currently, some digital subscriber line (DSL) service providers use PPPoE to maintain the familiar "dial-up" experience for users who use a DSL modem to connect to the Internet.

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