I have DARA loaded on a machine trying to capture events from both the Browser and IIS and send them to machine one, and the page could not be loaded. As soon as I turn off DA for that machine, the page works fine.
DA requires that the account under which web applications (usually IWAM_machinename) are run is a member of the Administrators users group. Try adding the account to the Administrators group and see if that resolves the problem.
This article is for DPS versions 7.1 and 7.2 only