DB error in my site

I use to got some DB errors in my site, this one did not like at all. When I was trying to enter admin area, I could not get and this error apears in my screen:

<div style="border:2px solid red;padding:4px;width:600px;margin:0px auto;">
                   <div style="text-align:center;background-color:red;color:white;font-weight:bold;">Error</div>
                   <div style="text-align:center;">Database connect failed</div>
                           </div>
           <br />
<b>Warning</b>:  mysql_error(): supplied argument is not a valid MySQL-Link resource in <b>/home/musicosp/public_html/inc/classes/BxDolDb.php</b> on line <b>431</b><br />
<br />
<b>Fatal error</b>:  Call to a member function getParam() on a non-object in <b>/home/musicosp/public_html/inc/db.inc.php</b> on line <b>83</b><br />

Finally I´m inside. Any ideas?  Thanks in advance!

Hello!

Seems ur hosting has limit on DB connects per base. Ask them to increase it.

Regards

Thank you very much for your replay LeonidS, will do this right now!!