Well I ran into another setup yesterday that is setup the same way as another customers and we cant install Acronis on our virtual hosted machines that have failover cluster feature installed. Kaseya and Acronis looked at the log and this is what they found:

The error we can find in the log is “COM+ was unable to talk to the Microsoft Distributed Transaction Coordinator”.

Please check that the Distributed Transaction Coordinator Service is started, and if not start it.

http://support.microsoft.com/default.aspx?scid=kb;en-us;316881

This article here is what I found and thought this sounds like the issue and so I changed the agent credential for that server from the local account username and password we use to the domain admin account and re-tried install and still failed.