Man this seems like the same almost same problem I been trying to fix on a clients computer. I havent had any luck. I tried every trick in the book, I even been to school for computer networking and I can't even figure it out. its like it worked before and now it just doesnt want to work no matter what you do. If I can remember, I think the last time I fixed this it was some file in the registry I deleted and rebooted the computer and it worked again, but I don't know.