Two different issues, "unable to load client print control" and drop down menu is disabled not allowing for export...
Followed instructions to logon as admin and install Active-X by printing sample report in SSRS...
Drop down menu has become enabled allowing for export, but still receiving message "unable to load client print control"
I believe this has something to do with IE and the service pack version of your report server instance but could be wrong.
Are you completely up to date on the service packs and patches on your report server SQL instance?