thats not what is causing your disconnections ... but what happens after the fact....
your problem is purely because you only have 1gb of ram on your vps, bad security ... a oversold host, "and" above all that judging from your screenshots an unsecured website running directly from the windows environment you have your server in .
get 1 -3 more gb of ram from your host (windows needs 1gb just for itself) ...
learn about firewalls
get a free or paid webhost from somewhere and put your website on it instead of in your vps...
change your passwords in your register and stat pages to something other than root test and add a hard captcha,
change the permissions for your website mysql user to only allow it to select from my and only insert into account....
block any unknown ips from connecting to your secure ports (21 22 3389 3306 etc)
re adjust your tcip connections for connections of long duration (already did with
[Only registered and activated users can see links. Click Here To Register...])
change your user info (for mysql "and" the gameserver login) in your gameserver from the default root test to something more original
change your firewall / gameserver configuration to disallow the npc server to connect externally and not listen on the master port
stop posting your servers info on random sites to get help
any or all of the above things will help with your situation
the selections in bold are the ones most likely to help you
