Livelink AutoCAD

Hi,

i have Comsol 4.2 and Autocad 2010. I tried to connect them via livelink, but comsol shows me all the time:

"Failed to connect to AutoCAD. Please make sure AutoCAD is running."

I cannot find a way to get those programms connected, you may have an idear?

Cheers,
Manu

(by the way, its for me not possible to read this page, becouse of license: www.comsol.com/support/knowledgebase/1123/)