As i understand you are able to connect wirelessly to the router.But not able to go online. Here is the steps,
step1:Check the ip address in Pc(ME) whether its getting ip address in the range of the router.
Step2:Open up the internet explorer.on the top of the screen you can find the option like file,edit,view,favourites, tools and help.
click on tools and go to internet options.
Step3: you can find number of tabs on the top. In that click on "connections" tab.
under connection tab , you can find LAN settings button. click on it nad you can find 3 check boxes. the 3 check boxes should not be checked.if it is checked, unchecked all the checked boxes and say ok or apply.
then check you are able to go online.
IF above step doesnt work, try the below step,
step1:configure static DNS to the PC.
preferred DNS is 184.108.40.206
Alternate DNS is 220.127.116.11
and say ok.
step2:Restart the PC and check are you able to go online.
Hope this helps you.:-)