Laptop Troubles

Well, my devout readers, I have both good news and bad news for you all! The good news is, I got a new laptop! The bad news of course, is that I cannot get it to work properly. I can get it to go to Google, and any Google site such as Gmail or Blogger. But, it will not let me on Facebook, Yahoo, or MySpace. Now, I can always get on these on my regular desktop, but that really kind of defeats the purpose of having a laptop. However, If you can help me out here, please let me know. Before anyone asks, yes, it is connected to a wireless internet!