Hi mparadiso13,
Sorry about that, sometimes is not your computer, sometimes its IE or sometimes a you proxy, or sometimes it can be the time you take to download from a servers, some servers limit the time in order to avail sockets for other users.
So you can start with kimsland's solution, then if it doesnt work, then think of calling you isp, and by the way that happens to gprs or 3g connections. i don't know yours.
Cheers R