eDocman download problem

Hello,
I just installed eDocman without problems, created a cagegory and uploaded a document without problem. But when downloading it says: "you are not allowed to perform this action", though the document is public in the backend.
I think I need some hint....

Hi

That's strange. Maybe it is something wrong with permission settings on your site. Could you please submit a support ticket sending us administrator account of your site so that I can check it for you ?

Tuan