Client Side Deduplication

Help me tell me please how to backup remote server to DataDomain with Client side Deduplication option in Backup Exec 2010R3?

I Have Backup Exec 2010R3(with name SBE), DataDomain 2500 and server which need backup(with name SforB) . I installed in SBE and SforB plugin DataDomain.

I create backup job  with deduplication to client but job ended with exceptions:

Client-side deduplication is enabled for this job, but it could not be used. Please check this link for additional information: http://entsupport.symantec.com/umi/V-79-18273.