SQL30082N Security processing failed with reason "15" (PROCESSING FAILURE)

Hi all.

I'm managing the following error during a system copy:

<b>SQL30082N  Security processing failed with reason "15" ("PROCESSING FAILURE").

SQLSTATE=08001</b>

Inside the db2diag.log, i have the following message:

<b>2007-10-15-16.44.56.793439+120 I718413554A270     LEVEL: Warning

PID     : 483450               TID : 1

FUNCTION: DB2 Common, Security, Users and Groups, secLogMessage, probe:20

DATA #1 : String, 64 bytes

Password validation for user sapr3 failed with rc = -2146500315</b>

Can anyone help?

Thanks and regards,

Marco.