Graphs at backend

Hi everybody,

I just installed Joomla-Visites and its looking great!!

However, the graphs are not visible in the administrator tools, where I need them. I already read some of the otger topics but still do not know what to do.

I am not very technical, so I hope someone can tell me in easy language what to do.

Thanx for the trouble in advance!!

Best regards,
Gerhard