[Koha] Help On Koha Server not Serving any web Page:

I am using Koha 3.01 on SUSE 11.0 using Nozebra. I have been using the server for quite some time and it is working well just suddely start this strange behaviour the harddisk light will be on and the server will not serve any page, until the system is shut down and start again. Pls kindly help out. Any help will be appreicated Akin Adigun (MCP) Akinomatics Tel: +2348035565348, +2348029219271