need admin help please...

Hi all I switched my provider and now i often get this error message when using mysql from my php-skripts: "Warning: MySQL Connection Failed: Can't create a new thread (errno 11). If you are not out of available memory, you can consult the manual for a possible OS-dependent bug in include/dbcall.inc.php3 on line 6 Unable to select database" could someone tell me what this exactly want's to tell me? and even better : what the admin of the server can do about it? thanks for any help Sebastian