I have set up a laptop to a wireless network here in Spain and everything works fine. I have also set up another one in the house which also is working fine. The problem I have is that I can't get them to log onto the internet at the same time how can I resolve this please or am I asking for the impossible?

what setup are you using?
are they both wireless?

have you got 1 router for both computers (on the same network)?

what isp do you use?
do you get an error message?