Well, to be honest I don't know what to do now. Here is the answer from our current shared hosting support team: This user without any doubt needs a dedicated server. It is not his bandwidth or space storage, his forum user connections is what creating the cpu load. Dedicated hosting server costs about 150$/month and my current payments don't cover that nor I haven't received any donations except one from JurgenDoe... I suspect on a hack, since it's not happening all the time.. There were no problems for 3 weeks since we moved to another server, until now..