.dll failed to register while installing BlackBerry Desktop Software 4.7

Hello techyv and BB users,
I have a question for you. I tried to install BlackBerry Desktop Software 4.7 and got the following error.

BlackBerry Desktop Software 4.7 Installer Information
Error 1904.Module C:Program Files (x86)Research In MotionBlackBerryIS71 ConnectorsISGroupWise6.5.XGW.dll failed to register. HRESULT -2147220473. Contact your support personnel.
.dll failed to register while installing BlackBerry Desktop Software 4.7
One other time i remember i clicked ignore (on the message i got) but then the installation got stuck on 98%. This means that the .ddl failed to register. Do I need to re-install v 4.7 or maybe the Windows Registry is not having permission to register the files?
Thanks for your time and answers!
Mati
