If you can get to the website with the IP and not the website's name then you have a DNS problem.
Try to change your DNS to 8.8.8.8 and the secondary 8.8.4.4 and then see if the website name works.
8.8.8.8 and 8.8.4.4 are googles name servers
+1
Also try this from command prompt:
ipconfig /flushdns
Thanks for yours replys, mates
i´ll try both things and still not working...
it seems more that a challenge tho.