snoW

I configured my TH55 so I can connect my PC via WLAN. On my PC is a D-Link DWL-520+ card for WLAN connections.

Now the problem:
NetFront doesn't accept a lot of URLs! For example "http://www.heise.de" will bring up an error:
"Wrong URL or invalid network settings." (translated from German)
If I go to this website by a link (which directs in this example to heise.de) from another page it works!!!!
This is confusing!

I checked the network settings and tried the disabled powersaving mode but nothing works.
I deleted cookies and the cache.

I can check my mail or visit shoutcast.com but NetFront won't accept a lot of URLs!

When I go to the NetFront settings and insert my PC LAN address at "use proxy", NetFront doesn't show this error but no website will be loaded (though the icon in the right upper corner is animated)

Need help!

P.S.: These unaccessible websites can be loaded from the PC, so the server of them are NOT down!