Configuration Error Interop.MsMask???

I have a problem when it comes to running my page after
building my project. I get this error:

Parser Error Message: Access is denied: 'Interop.MSMask'.

However, when I delete the file "Interop.MSMask.dll" on my
bin directory, I'm able to run my page with no problems.
The problem is, everytime i build my project, it keeps
creating this dll file on my bin directory and I don't
even know how it gets created and where its coming from.

Is there a way for me to get rid of creating this file
everytime I build my project? It's really a hassle having
to delete this file everytime I want to run my page.

Thanks
Emmanuel