Backup Exec 2010 R3 Failer to work with OfficeScanTrend Micro

Hi, I have problem with OfficeScan Client on Backup Exec 2010 R3  Server

Whenever  OfficeScan is on and running scan .. the backup job fails 

i have tried it unloading  officeScan .. then it works fine , it completed its job , that is why i realize, there is a real problem with officeScan and backup exec

I have tried disabling officescan's scheduled scan for the backup exec on the Time Window of the backup job..

but to my surprise .. the officeScan is running scan at that time 

so is there anything i missed .. could you help me please ..