PCNS are not delivering password to existing Target users

Hi,

I am getting strange problem in PCNS 

I have two forest or domain ABC.INTRANET(SOURCE) and XYZ.INTRANET and FIM 2010 R2(Target server for PCNS to deliver pwd to XYZ forest)

• existing user changes password in source forest, event shows 2100 (means password forwarded to target server i.e FIM)
• But the same user cannot log-in using same password.
• If i delete the user in XYZ forest and tr password change it works.

Now i have some 4000+ users in xyz forest all of them is facing same problem.

How to resolve this issue 

Note: Using trial version and FIM stopped working ,this is happened after updating to licensed copy of FIM.