.PDF File Association for All User Profiles

Hello. I am currently working on a deployment of Adobe Acrobat X Professional.  The deployment works folllowing this process:

• Remove Foxit Reader
• Install Adobe Acrobat X Professional (Which removes Adobe Acrobat 8)
• Run command >>> assoc .pdf = "C:\Program Files\Adobe\Acrobat 10.0\Acrobat\Acrobat.exe" "%1"

Foxit removes itself fine, Acrobat 8 gets removed, and Acrobat X is installed, the only issue is PDF files are not associated with Acrobat X.  If you choose to open the pdf in a browser it opens in Acrobat fine, but if you have a PDF saved somewhere it pops up asking what program to open it with.

I am looking for a way to associate PDF files with Adobe Acrobat X Professional across all user profiles.  I thought the command assoc .pdf = "C:\Program Files\Adobe\Acrobat 10.0\Acrobat\Acrobat.exe" "%1" was going to be my solution but it does not work, even though it runs fine.

Any ideas / advice is greatly appreciated, even if you point out that I am doing something complety incorrect.

Thanks,

Larry