Sorry for being a n00b but just a few days ago, I've been having trouble surfing at home and I'm not sure if it's Screamyx or TMNut's barely 1-year old Riger Modem... Here's an example of my situation:

Turn on computer > Access GMail / Yahoo! Mail = OK. Facebook = Cannot.
Restart Modem > Access Facebook / GMail = OK. Yahoo! Mail = Cannot. (Or very slow in loading)
Restart Modem > GMail / Facebook / Yahoo! Mail = OK... After 30mins or so, cannot load or very slow in loading webpage

If I restart the modem again, it might go back to the first situation. Some websites that I normally visit either cannot load or load extremely slow that it gives up. I've tried all, Firefox / IE / Google Chrome, same results for the websites I'm trying to access. But when I'm at the office, no problem.

I called up TMNut, said my line was fine. What to do?