change email password tab is not showing the form

[sonia]

hi
I installed roundcubemail-0.1-rc2 in the home folder (public_html)
After that I modified and uploaded some files for changing the email password from patch file.
So change password tab is added in the personal settings.

Now all others are working perfectly except the change password tab link.
I enabled the password link.But clicking on the change password tab, that is not showing the password changing form.

Why it is not working?How can i make enable this?

Plz help me how to resolve this issue.

Thanks