Hello, After setting-up a clean install of my vps I have installed mod_security. From of that time my panel is loading slower and slower and then stops. It gives the report that it has no more memory. If I refresh the page I get a 503 and that never stops. The websites on the server keeps on working with no problem at all. But I'm not be able to enter the plesk panel. i have to reboot the server. I can't get an answer with googling so I was hoping that someone over here knows the answer. I have made a snapshot of the moment of the 503. I hope this is useful. top - 17:35:25 up 1:13, 2 users, load average: 0.09, 0.21, 0.14 Tasks: 58 total, 2 running, 56 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0%us, 0.6%sy, 0.0%ni, 99.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 5123756k total, 348092k used, 4775664k free, 0k buffers Swap: 0k total, 0k used, 0k free, 0k cached Kind regards, Roy.