My MBP has worked fine in the past with every wireless network it has been on. But I just connected to this one network and can only load pages such as google and yahoo. I cannot load apple.com or ebay.com or any pages that have "a lot" of data transfer to be done.

The router is a Belkin Wireless G. I have connected to the exact same model of router before and had no problems (as a matter of fact, this router is the exact make and model of the router I used daily at home). For some reason, this particular router is giving me these issues. Any suggestions??