Exceptions while doing AD related activity

Hi,

i am not sure to which head does this problem belongs ....but this seems to be a security issue to me..

I am writing this post after googling aroung for 2-3 days..Frown but still can't find any resolution to my problems.

Let me describe my problem:-

I have created a website which does the following tasks:

1) Creates a user

2)Enables/Disables users

3)Delete users

4)Unlocks users

5)Reset password of a user

in Active Directory.

I have used impersonation in my application which uses the admin credentials to perform above tasks.

When i run this application in debug mode through Visual Studio 2005 ,all the tasks are performed successfully.

Now comes the deadly exceptions i am facing after publishing the website and hosting it on IIS.

Task 2 & 3 are still working fine and i can enable/disable and delete user from AD even aft ...