Hi again.
I found a thread in th forum about the same problem and the solution was to uninstall the gallery module, but I do not have the gallery module installed. Could it be another module or what can it be.
Any suggestions?

Regards
Kurt

Yes, Events and XML are the newest versions (5.1.4 and 4.3.5).
Chat module is not installed and has never been installed.

I am a little lost, because I don't know much about DNN yet.

/Kurt

Yes, RadEditor Config from DNNWerk (if that's a third party module), but the trouble did not start immediately after installing this.
The RadEditor Config was installed to solve another problem I had with DNN.
I am getting a little uncertain if DNN is good enough to use, because I think there is a little to much trouble showing up from time to time, but let us see if this one can be solved. I think I have learned that you don't change anything unless it's absolutely necessary.

It is a strange behavior - the error comes when I enter the site and if I close the browser and opens it again and then enter the site, it works. It is af if I have to "wake it up" every time I want to use the site :-)

/Kurt