DP5.5 & Exchange Single Mailbox Backup

[megatukker]

I'm running DP5.5 on a HPUX 11.0 server.
I also have a Win2003 SP1 server with Exchange 2003.
When i do a complete Exchange backup i have no problems. WHen i do a full backup of a single mailbox backup i have no problems.
WHen i do an incr-1 backup i get the following error and i cant get rid of it.

[Major] From: BSM@ksd "Single MB incr" Time: 08/31/06 17:51:13
[61:3003] Lost connection to OB2BAR Backup DA named "Single Mailbox" on host ksdms01. Ipc subsystem reports: "IPC Read Error
System error: [232] Connection reset by peer
"

[Normal] From: BSM@ksd "Single MB incr" Time: 08/31/06 17:51:13 OB2BAR application on "ksdms01" disconnected.

[Normal] From: BMA@ksd "Exchange" Time: 08/31/06 17:51:50
/dev/rmt/0m Medium header verification completed, 0 errors found

[Normal] From: BMA@ksd "Exchange" Time: 08/31/06 17:51:50 By: UMA@ksd@/dev/picker
Unloading medium to slot 9 from device dev/rmt/0m

[Major] From: BSM@ksd "Single MB incr" Time: 08/31/06 17:52:33
[61:3003]Lost connection to OB2BAR Backup DA named "Single Mailbox" on host ksdms01.
Ipc subsystem reports: "IPC Invalid Handle Number"

[Normal] From: BMA@ksd "Exchange" Time: 08/31/06 17:52:33
ABORTED Media Agent "Exchange"

[Major] From: BSM@ksd "Single MB incr" Time: 08/31/06 17:56:20
[61:1002] The OB2BAR Backup DA named "Single Mailbox" on host ksdms01 reached its inactivity timeout of 300 seconds.
The agent on host will be shutdown.

[Major] From: BSM@ksd "Single MB incr" Time: 08/31/06 17:56:20
[61:1002] The OB2BAR Backup DA named "Single Mailbox" on host ksdms01 reached its inactivity timeout of 300 seconds.
The agent on host will be shutdown.


Anyone any clue ?????????

Thanks