Topic: Can't display images

I read the forum, but not found anything that helps in my case...

The thing is that I can't display images or galleries.
We use DNN and fck editor that has import flash button, but after that it says that gallery is not found, same as I would try to open viewer.swf from 

Second method that I tried is to open it from browser like:
Then it founds gallery, but instead of pics, it displays x.

Third, if I open it like:
it works, and also works if I open viewer.swf with for example GOM player (video player).

I think that problem is with DNN. Please help!