wireless probelm

HI,
i have just bought a linksys wireless kit with pci card, it has worked
for the first day, but the next morning it stopped. I then deleted it, and
installed it again. After theat, it was working fine again, until the next
morning. I have put in the ip address, subnet mask and default gateway in,
but it still woont let me on the internet. It has found the router and
connected to it, but it just wont let me on.

If you could help, please could you reply and tell me what i could do.

Thank you,
Aaron Age 14