The fastest way to update your password if you forget is to edit the MYSQL database file. I tried a number of other things and then this finally worked. Thanks to another posting!
1. Open phpMyAdmin
2. Select the correct database
3. Edit “vtiger_users” table
4. Edit the field user_password=’adpexzg3FUZAk’
5. Edit the filed user_hash=’21232f297a57a5a743894a0e4a801fc3′
6. Edit the filed confirm_password=’adoY/6Mlw8kqg’
7. login with admin/admin
This is taken from here at the VTiger forum
We try to use your above mentioned method to change database, not still can’t login
user name restrict to : admin
password : admin
right ?