ePSXe in OpenGL2 only shows about half the screen/zoomed in?

[Turkish2]

Hello people, I'm using the latest OGL2 2.9 plugin, I have 2 problems with this plugin:

first, it is constantly flickering/flashing, (but I managed to somehow fix this)

and my biggest issue:

When in window mode or full screen, ePSXe only shows around 50% of the image, example in Tekken 3: I can only see my own fighter, the other fighter is not on the screen...

I have tried it with the normal OpenGL but it also gives me the same problems, while D3D works fine. This seems to be an issue of OpenGL

I have an i5 2500k and HD 6870 with the latest drivers. It should not give me any problems.

Are there any specific drivers I could download regarding OpenGL?

Thanks in advance!