KdeSudo password problem

Hi, I have been using TDE (now 5.13.1) with Kubuntu Oneiric for a year or so. I regularly update with adept_updater. It worked fine until my last update. But now when prompted by adept_updater for my admin privilege password, after 3 tries, I get a KdeSudo Error window saying Wrong Password. But I have not recently changed, removed or added any password. It consists of alphanumeric characters only. This same problem applies when I try to open other kde applications that require administrative powers. I urgently need your help to get my password back. I do not have this problem when I log into TDE at the beginning of a session or kmail, or when I open a superuser console from the regular console. Here is some info I can give you : $ ls -l kdesudo -rwxr-xr-x 1 root root 55972 2011-10-26 17:24 kdesudo $ ls -l adept_updater -rwxr-xr-x 1 root root 1246592 2011-10-14 17:36 adept_updater $ dpkg -l | grep kdesudo ii  kdesudo    3.4.2.3-2ubuntu3           sudo frontend for KDE ii  kdesudo-trinity      4:3.5.13-0ubuntu9+r1260892+pr3~oneiric       sudo frontend for Trinity Thanks in advance for responding. I really appreciate TDE and all the work behind it. Marco