Problem> Database Error

[ceciliacelis]

Hi
I'm working with my forum and everything was ok. My database connections very fine, i was log in without any problem but i see that now when i want to log in it appears a data base error and the members or myself can't log in.
I really don't know what happend, how can i see if my database connection it's ok, it was working fine and i didn't modify anything, the config.php it's ok, the database is in smallbusiness yahoo... (the 'mysql' parameter it's ok, i didn't put localhost, so this is no problem in there)

What can i do??
I'm attaching a printscreen of the error

Thanks

[rgMM]

If you look at the page source you should be able to see a better description of the error

[Mr_Butter]

Yeah, right click and view source and scroll down and it should say why it got the database error.