Report Module in emoncms is not showing up

Hi 

I'm trying to get up running the report module in emoncms. so far I was able to install the Module on my Linux Server.

As soon I want to select the reporting over the menu ->Extras->Report it says: 

"The requested URL /emoncms/report/electric was not found on this server"

The URL link is: http://192.168.75.126/emoncms/report/electric.

But I was only able to find the file electric.php on my server. When I open the link manually: http://192.168.75.126/emoncms/report/electric.php then the browser shows some elements of the reporting module but it's not working. 

Can you help me?