Server not found when I want to go to the Network Dashboard

Hi,

Recently my site was copied form my test domain royvankleef.nl to my main domain weddingreport.nl. I wanted to upload a new plugin so I clicked on the network dashboard on "mysites". It worked fine on my previous domain but now it gives me a server not found message. Is it possible that this happens due to some db fields which might not be changed to the new domain? I did replace all royvankleef.nl by weddingreport.nl in the database.
Any ideas?