Programs Cannot Access Internet

I don't know what part of my computer this problem is wether its
because I have AOL or the router is messed up but... Before certain
programs like iTunes couldn't access the internet unless AOL was open,
this was with a Wireless Linksys B router, recently we upgraded to a
Wireless Linksys G router, and now even with AOL open, about half of
the programs on my computer can't access the internet.

I have disabled windows firewall, norton, and even the firewall on the
router but they can't connect. Port forwarding isn't doing anything
either. Is there some feature on the router that is preventing this or
is it a problem with AOL? (I have AOL Broadband)