Error with the installation of Morae3.2.1

Hi fellows,
I have been recently trying to install Morae 3.2.1 on windows 7 x86. Whenever I start the installation, it starts successfully but when only 9 seconds are left an error pops up on the screen. The screenshot of the error is as follows:

I don’t want to install the Word 2007 plug in but my system seems interested to install it. What does this error 1722 means?
Does anybody have any idea? Please help me solve the problem.
Waiting for your ideas
Thanks
Thomas
