Server issues?

[Peter Cook]

Not sure if this is the right place, but, our website has been having extremely slow loading times and sometimes being reported database errors! below are a couple of reported errors.

example 1:
Invalid SQL:

SELECT *
FROM session
WHERE userid = 0
AND host = '62.4.27.91'
AND idhash = '64519265b60532704e960889f9c10763'
LIMIT 1;

MySQL Error : MySQL server has gone away
Error Number : 2006

example 2:

mysql_connect(): User lswukcouk already has more than 'max_user_connections' active connections
/hermes/waloraweb044/b1061/moo.lswukcouk/includes/class_core.php on line 317

MySQL Error :
Error Number :

Can anyone help with this as the hosting company says it's loading fine at their end.

thanks all.