V-Ray Frame Buffer is Empty

[mailVMAWS]

Hello Guys,

Recently the frame buffer doesn't show anything but the grey background of it, when I click on "render" as well as on the teapot or with shortcut. I restarted the computer and it didn't change. 

Yesterday I got a new monitor, next to my laptop. Before that it worked. But If I remove the monitor that doesn't change anything about it.

Does anybody have an idea what I can try?

Best regards 

Philipp

[mailVMAWS]

Edit: Now I tried scanline and arnold, they work.
I am currently studying the programm in a cursus. I got the free trial version. I also reinstalled that one to make shure its not about the application. But that didnt change anything too.
Maybe I reinstalled it wrong? I have no clue what to do. My teacher says I have to figure it out myself... lol.

The Vray manubar in the rendersetups is also empty while in the vray-renderer mode. If I change to vray gpu, the manue is visible and If I start rendering there is written doen below " preparing renderer..." but nothing is happening.

tell me if you need more information.

thank you very much.

philipp