I doubt your problem is with AnalogX.
I have been using it for in excess of two years with no problems at all.
If you haven't been able to set-up ICS successfully, I would suspect XP Pro as being the culprit. It appears it can be "difficult" in this area.
When you say it "drops the connection", do you mean it disconnects from Pipex and you have to re-connect to the Pipex server? If so, it's more likely to be connected to the network interface or your modem.