restore wubi installation

[tbhatia4]

Hello
i installed ubuntu via wubi but my widows got corrupted and had to be restored i wanted to restore wubi so i reinsatlled wubi and replaced the new root.disk with the old one but the issue i am facing is that it asks for a login password at the root screen which i am sure is being entered correctly but it says login incorrect
however after replacing the same root image with the new one its working absolutely fine kindly help me restore my original installation
thanks in advance

ubuntu version 11.04
however i must imform that the linux image of my new installtion differs from old one is this creating the issue if so kindly help me replace the linux image as well

[pavi_elex]

Log-in as user.

type in terminal now
sudo gedit /etc/gdm/gdm.conf

Now find for AllowRoot=false and change into AllowRoot=true and save it.

change the root password or activate the root account
sudo passwd root

[tbhatia4]

Log-in as user.

type in terminal now
sudo gedit /etc/gdm/gdm.conf

Now find for AllowRoot=false and change into AllowRoot=true and save it.

change the root password or activate the root account
sudo passwd root

will give this a try and let you know

thanks 4 ur concern

[tbhatia4]

will give this a try and let you know

thanks 4 ur concern

i should do it after replacing the root.disk directly or i should upgrade my new linix image to match my old one????

[tbhatia4]

no luck yet

[bcbc]

What do you mean by root screen? do you mean a console login, or the graphical login?

Is it possible you just forgot your password, because you can reset it very easily?