problems with database

[eluser]Unknown[/eluser]
I have this problem
worked before but now only shows that message
-----------------------------------------------------------------------------
Unable to connect to your database server using the provided settings.

Filename: core/Loader.php

Line Number: 232
-----------------------------------------------------------------------------

How can I fix this problem

look
http://yensedavid.comuv.com/

[eluser]iversonchen[/eluser]
waiting for the solutions.

[eluser]4ever[/eluser]
I have similar problem but I sent my wuestion there:

http://ellislab.com/forums/viewthread/189095/

do you have set config.database.php?