Unable to install Joomla through Fantastico

[The Conqueror]

I am facing the following error :

Warning: mysql_connect() [function.mysql-connect]: Access denied for user 'conquer1'@'chopin.x10hosting.com' (using password: YES) in /tmp/cpanel_phpengine.1302083197.3438dCkTx1RfRU on line 1640
Access denied for user 'conquer1'@'chopin.x10hosting.com' (using password: YES)

Also, I am not able to change my MAIN Domain to moviewizards.co.cc.

[MaestroFX1]

Hello!

mysql_connect() error
----------------------------
Please note that the Database and database user should be linked together with required privileges set.

To do that, go to
cpanel >> MySQL Databases >> Current Databases >>MySQL Account Maintenance >> Manage User Privileges

Also, note that
servername = localhost
username = cpanelusrname_databaseusrname
databasename = cpanelusrname_database
password = password for cpanelusrname_databaseusrname not cpanelusrname

MAIN Domain to moviewizards.co cc.
------------------------
Please post your error in detail.

To change main domian:
Go to https://x10hosting.com/control/
Then Hosting >> Modify Domain

You will be presented with "Hosting Account Main Domain Modification" page

Use "Change your main domain".