bash: /usr/bin/sudo: Permission denied

[Ram Goga]

I have 10.5.7 installed on one of my partitions (MBR) on my dell 1525 (dual boot with vista). and now I have installed 10.6 on a external drive (GUID) and updated to 10.6.1. Then created a dmg of that partition and restored on to the internal partition replacing 10.5.7. then installed chameleon to it and voila ....I could log on to 10.6.1 on my internal partition. I thought everything is OK untill I noticed --

 

1. sudo -s returns bash: /usr/bin/sudo: Permission denied

2. 'kexthelper B7' does not open

3. repair permissions gives the follwoing output

Warning: SUID file "usr/bin/at" has been modified and will not be repaired.

//about 20 similar lines

4. update manager fetches but fails to install

 

However internet works

 

I have tried loggin in -s and -x modes but no luck

 

here are my laptop specs

 

dell inspiron 1525

core2 duo

2gm ram

250gm hdd

intel 965

sigmatel

broadcom wireless

 

Please help