wireless connection

Hi. I have a wireless connection here at work that uses WPA. It was working ’til yesterday. I did a power cycle on both the wireless router and the DSL box. It shows that I’m connected. I’m getting full signal, but I can’t go online. Everytime I try to surf online, it keeps saying that I’m not connected. I tried to do ping, but it keeps telling me to check the URL I’m trying to do a ping on, but it’s typed correctly. I did an ipconfig, and the ip address is ok. The only weird part is that my DNS Server got 2 entries. I really don’t know how to fix this. Please help. Thank you.