PLEASE HELP!!

My home page, http://www.seasonsofautumn.com/zen, now reads the following:

126 Incorrect key file for table './seasonso_zc1/zen_whos_online.MYI'; try to repair it
in:
[update zen_whos_online set customer_id = '0', full_name = 'ĄGuest', ip_address = '172.191.217.103', time_last_click = '1190396639', last_page_url = '/zen/index.php?main_page=down_for_maintenance', host_address = 'ACBFD967.ipt.aol.com', user_agent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6' where session_id = 'f12fdb4a178144406bacb56a2d5fe293' and ip_address='172.191.217.103']


I've tried to reinstall the mod, and then tried to revert to a previous backup and I still get the same. Someone please, please help me. I'm using Zen 1.3.7.