Trying to connect a linksys wrt54g

I'm trying to connect a wrt54g v5 linksys router. Its connected to the internet and to my computer but I can't use my internet. It shows my subnet mask as 255.255.254.0 and then switched to 255.255.240.0 a little while later. Is that the problem because the router is set at 255.255.255.0. Its connecting using DHCP settings and it shows my default gateway as 216.232.176.254 in my local settings but its actually 192.168.1.1. I'm also missing my host and domain address.

WHAT THE **** is going on? How do I get the subnet mask back to 255.255.255.0?

 

have you tried resetting the router to factory default and doing a release and renew on your network adapter?