Laptop: Won't Go Online with WiFi or Ethernet

[sega4life]

Ok I have this Toshiba Satellite Laptop that was working great, I didn't use it for a couple months because I was working allot..

anyway, I tired to go online with it and it will not connect, not with WiFi or Ethernet nothing....

I have a 2Wire Router/WiFi,  and all my systems, PC's, and other Laptop connect to the router fine, with WiFi or Ethernet..

I can not get this F'en thing to connect...

I can say this tho.. I used this laptop when I ran the skate park and there was no internet around so I connected my MDA and used it as a modem, and it worked, but I think I might have messed up the connect part of the Laptop when I used the MDA connection, I have sense deleted that connection (or so I think)...

Any help please.