for v3.X "TDAProtect.dll" plugin have bug with "Force IOCP enabled" (Compatibility mode with Some gameserver like GunZ) make it stop accept connections when run a long time (days or weeks)
With Mu i don't have report of connection problems.
If have any issue with the system you can write to my inbox here or in facebook, the support is free.
The problem is show in your browser, That is the response of your apache, if TDAgg have a response http code different of 200 or 304, will closed, Server_Responce.html or err_GameGuard.log have error information.
your apache log will show what is the problem, maybe a bad url configuration of TDAgg or missing file in hosting folder.