When i install it over terminal, there is no problem.
But another question. With Ubunutu 12.04 64bit i'm not able to install .Net 3.0 Framework, only the 2.0 version.
Does the whole thing work with the 2.0 version of the .Net Framework?
I don't believe it will work with 2.0, but you could give it a try. I'd suggest checking the Wine forums to see if anyone has figured out how to get 3.0 to work on 64-bit Linux.