Changing User Password from PUC

Hi,

I have just started working with Pentaho BI Platform. As there is no option of password change in pentaho BI tool, I have built an application using which user's can change their password using PUC. But problem I am facing is that, as I change the password, there is no doubt password is getting updated at database. But when I log out and try to log in pentaho still allows with old password not with new password. But if I restart Pentaho and try to log in it allows with new password.

I tried clearing browser cache, pentaho's repository cache, system cache but still no use. So Can any one please help me out in resolving these issue.

Thanks in advance

Regards
Harsha Reddy