Backup Exec 2010 R3 SP2 Exchange Dag Group Recovery

Hi, need a solution.

I have an Exchange 2010 Dag Group (dag.domain.lo 192.168.55.26) with 4 virtual servers:

mx1 (mx1.domain.lo 192.168.55.21), mx2 (mx2.domain.lo192.168.55.22) - Database storages with RAWS installed on it.;

cas1 (cas1.domain.lo 192.168.55.10), cas2 (cas2..domain.lo 192.168.55.11) - CAS Array with RAWS installed on it.

The backup job works fine, but I can't do a recovery. All recovery jobs are fail with error "The Media Server was unable to connect to remote machine cas.domain.lo on network interface Local Area Connection"

cas.domain.lo is a CNAME of cas1.domain.lo.

I think this happens because cas.domain.lo isn't published. I can't see cas.domain.lo in Remote Agent Utility on any server. How can I publish it?

sry for my eng.