Backup Exec 2012

Dear good morning, 

I have a problem with backup exec 2012, I can not do backup exchange 2010 Mailbox server and I get this error v-79-57344-37930. 

I explain the last weekend they wanted to implement on that server exchange 2010 DAG, however they failed to make that change so it stays with the same exchange 2010 Mailbox server. 

Now the problem is that by the exec backup tool can not do this alone backup server to the other servers if you are backing up properly. 

I restarted the mail server still does not get to the backup server exec communicate with the agent installed on the mail server. Ping when I backup exec server to the mail server if you respond. 

agradecere your help.