Auto delete Exchange 2010 Logs after Backupjob with vRanger 5.2.1

Hey guys.

I have a problem with the logs from Exchange 2010 VM after a Backupjob. Normaly the vRanger delete the logs automatically after the job is finished.

But since a few weeks the logs are not deleted. Have anyone an idea what will be happen or what is wrong??

Versions:

Exchange --> 2010 on 2008R2 Standard

vRanger --> 5.2.1

vSphere --> ESXi 4.1 Update 2

Thanks for help in advanced!

Greets, Matthias