Networker Module for Exchange 2003 - Can not backup mailbox!!!

Hi Support,

Please help me with this problem:

1. From the Netwoker client side (Exchange server):
- Can backup Mailbox

2. From the Networker server side:
- Can backup Information Store
- Can not backup Mailbox (process stop at: contacting client)
- In log file see the message:
(05/31/07 14:03:28 nsrexecd: SYSTEM error: There is already a machine using the name: "ncspdinex01.ncsp.com.vn". Either choose a different name for your machine, or delete the "NSR peer information" entry for "ncspdinex01.ncsp.com.vn" on host: "ncspdinis01.ncsp.com.vn")


Thanks and Regards,

Tien.