Backup Exec 2010 VMWare SAN Backups V-79-57344-38277

I'm having issues trying to backup a VMware environment with Backup Exec 2010. I setup the iSCSI initiator service. The LUN's show up in disk management. I see that the snapshots in vcenter are created and then almost immediately removed. Backup Exec reports failure "V-79-57344-38277 - Unable to open a disk of the virtual machine" I'm using a Dell Equallogic san, is there some specific program or driver I need to load so Backup Exec can talk to the SAN?