Uninstall and Adding new users

Hi all!

I just install the 1.2.2 stable release.
The installitation went smoothy.
I log in, and trying to add a new user, when I finally click on add user, it redericts me to an error page:

"An unexpected error occured
An unexpected error occurred. Please contact your administrator."

When I tried t uninstall the program it says:

Exit code: 255
root@livesigntechforms001:/var/www/imscp/engine/setup# perl imscp-uninstall
Global symbol "$rs" requires explicit package name at imscp-uninstall line 320.
Global symbol "$rs" requires explicit package name at imscp-uninstall line 322.
Global symbol "$rs" requires explicit package name at imscp-uninstall line 323.
Global symbol "$rs" requires explicit package name at imscp-uninstall line 323.
Execution of imscp-uninstall aborted due to compilation errors.

What can be the problem? Maybe it's important, before this I had the eagle version displayed in my profile, but the uninstall went their without any problem.

You are right as always.
I turned debug mode on, the following came up:

An unexpected error occured
An exception has been thrown in file /var/www/imscp/gui/library/shared-functions.php at line 2537:

SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'signtechforms.com' for key 'admin_name'

Query was:

INSERT INTO admin ( admin_name, admin_pass, admin_type, domain_created, created_by, fname, lname, firm, zip, city, state, country, email, phone, fax, street1, street2, customer_id, gender, admin_status ) VALUES ( ?, ?, 'user', unix_timestamp(), ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ? )

This means I have this as admin name from the previous version, but I cannot see the customer in the list, and I want to use this domain.
Should I simply remove it from the database by myself?