When you say "the modem" what device are you referring to?
I connected the router to the main modem, which is plugged into several other computers.
Classmate ethernet port should be connected to one of the router's ethernet ports with an ethernet cable. Check?
i dont understand what you mean by this
Classmate IP address 10.xx.yy.5. Check?
i typed 10.6.40.5. but nothing showed up
Router IP address is 10.xx.yy.4. Check?
same thing for the classmate IP address
Open a browser on the Classmate and type 10.xx.yy.4 into the address box and you should see the router's setup screen. Check?
Follow the instructions in
this document and tell us at which step the problems start.