ORA-25264: cant get signature for this queue
Cause : An attempt was made to dequeue the signature from this queue, which is not reciever non-repidiable.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Try dequeue again without the get signature option
Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.