Problem with su and sudo after installation

[Katarzyna Myrek]

Hi

I installed Debian Squeeze using fai. I created a special class for this
host to install some packages (sudo etc.) and a hook which adds a user to
newly installed system.
After installation system boots without a problem. I can log as root to
both text terminal and graphic environment. When I log as a normal user I
can't use su or sudo...

When I try to use su I always get su: Authentication failure .
When I try sudo I get: sudo:must be setuid root.

I tried to add to hook commands:
chmod +s /target/bin/su
chmod +s /target/usr/bin/sudo
chmod 4755 /target/usr/bin/sudo
chmod 0440 /target/etc/sudoers
chmod u+s /target/usr/bin/sudo
chmod +s /target/bin/su

But they didn't help...

Any suggestions...?

Regards,
Olivia
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