My b2evolution Version: Not Entered

Hello,

I've got a serious problem, people get kicked off my website and sometimes need to use a proxyserver to connect.

My host didn't ban anyone, my .htaccess is clean, no IP Deny manager records and I get a lot of anonymous user sessions.

4060 in just 3,5 hours !

I think something is really messed up cause I get these errors in error log but I don't know what to do about it.

for example:
This one I got the most

b2evolution error: MySQL error! / MySQL server has gone away(Errno=2006) / Your query: DataObjectCache::get_by_ID()SELECT * / / FROM evo_skins__skin / / WHERE skin_ID = 63 in /home/nujijorg/public_html/members/inc/_core/model/db/_db.class.php at line 587 / REQUEST_URI: /members/ / HTTP_REFERER: http://nujij.org/members/

Some of the other regular errors:

b2evolution error: MySQL error! / MySQL server has gone away(Errno=2006) / Your query: Hit: Check for reloadSELECT hit_ID / / FROM evo_hitlog INNER JOIN evo_useragents / ON hit_agnt_ID = agnt_ID / / WHERE hit_datetime > '2010-01-25 13:39:30' /

PHP Fatal error: Call to a member function get_sql_where_aggregate_coll_IDs() on a non-object in /home/nujijorg/public_html/members/inc/comments/model/_commentlist.class.php on line 77