How to Open PDFS in Browser using Acrobat Pro and Not Adobe Reader

I have Adobe Reader XI and Acrobat Pro X installed on my computer.  I have XDF forms on my website that I open but when I open then in IE within the browser they open using Adobe Reader.  If try to disable Reader as a Managed Add-On and enable Adobe Acrobat, the forms cannot open within the browser (they try to open in Acrobat itself, but they don't open properly).

Should I uninstall Reader XI?  Is that maybe causing a conflict?

If not, how can I set preferences in IE so that all PDFS open be default using Acrobat Pro and not with Reader?

Thanks,

Steve