Bumblebee - Both graphic cards show errors while running glxspheres

Question

So, Im running Ubuntu 12.04 on my Acer Aspire 5750G with Intel HD3000 and Geforce GT540M. After installing bumblebee I get:

name of display: :0.0
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Error: couldn't find RGB GLX visual or fbconfig    

for glxspheres and:

name of display: :0.0
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Error: couldn't find RGB GLX visual or fbconfig

for optirun glxspheres.

As Im completely new to Linux in general, I dont have any Idea on how to solve this.

Cheers