A Little Wireless Help, if you please.

[Skulhedface]

here's where I'm forced to admit that I know next to jackshit about computers.

About a week ago my wifey and I started digging through her father's old things and we nabbed his old wireless router. It worked at his house, we kinda figured it'd work at ours.

Now, I kinda figured all I'd have to do is run the connection from the back of my computer to the router, then from the router to my modem and voila, wireless connection. This, sadly, is not the case. Despite trying the connection a bazillion different ways, all resulted in my computer telling me that I have limited or no connectivity, yet when I plug it back in directly to the modem everything's fine.

So... do I need my dead father in law's password or something? Is there even such a thing? Did I hook the damn thing up wrong? Do I need to notify my ISP that I HAVE I wireless router now? Ahh, questions.

Any help would be greatly appreciated.