wired internet problem

hello all,
i bought a laptop, a toshiba satellite l670-143. It has windows 7. And im experiencing a problem with the wired internet. Wireless works, however sometimes even when it has good reception and connection to the internet, i dont have acces to it for a short period of time(just this laptop). This happends frequently. So i thought, for gaming, i could just plug in the internet cable that belongs in my desktop, in my laptop. When i do that, it says that im connected to an unknown network. And that im not allowed on the internet. It asks for an username and a password when i try to connect through it. But we dont have any of that. On all desktops we can use wired internet, and on the non-windows 7 laptops we can use wired internet too. We just plug it in, and we have internet.

And I googled around, trying to find solutions but I have not found anything that worked yet. So help would greatly be appreciated, as this is very very frustrating..

http://img697.imageshack.us/img697/2489/internetoh.png
Im sorry its all in dutch, ill explain it all. WLAN is my normal wireless internet. When i plug in my internet cable i get WLAN2. It says its connected, but im not allowed access to the internet (geen internet toegang)

When i try to connect to the ''breedbandverbinding'' aka broadbandconnection, it says its ''calling'' the internet, and then i get an error that it failed.
When i try to diagnose it, it fails too.

I made sure that all the DNS and such are set on automatic IP detection.

Apologies if im doing anything stupid, im just not very familiar with stuff like this

tried both, and it says that i already have the newest drivers. Should i perhaps try different drivers if thats even possible?

cant seem to install that.. i dload and open it, and then it says that winbatch is processing and then it just goes away. And its not installed when i look at netwerkadaptors