Problem installing Zetadocs – Please Help

Hi all
I wanted to install Zetadocs for document management. When I start the installation, I get an error. The screenshot of the error is as follows:
I have OS windows 2008 which is fully patched. I also have Dynamics nav 2009 r2, 2009 sp1 and 5.0 sp 1 installed successfully in my C drive. They all are running exceptionally. I cant get to the root cause of the problem.
Your help is required to get rid of the error message
Regards and best wishes
Jane
