why will every website work on my computer except for facebook?

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when i open up the internet on my computer (firefox) and the desktop as well as my mom's laptop (those two use IE) on all three computers we can get everything on the internet to work except for facebook. It is not blocked or anything, i did manage to get on it for a little bit yesterday but then lost the connection to it a little while later.
it's weird to me, because if it were our internet connection you would think this would be happening with other sites too, or just not being able to get onto the internet period. and nobody else i've talked to is having problems so it doesn't seem like facebook is down.

i have tried deleting my cookies and all that jazz, restarting the modem, everything i can think of

does anyone know what's going on or how to fix this problem??
i also updated my adobe and java
when i try to go to facebook it just sits there and tries to connect forever then says that it has timed out