DB function failed with error number 145
Table './liv_laga_2/jos_session' is marked as crashed and should be repaired SQL=INSERT INTO `jos_session` ( `session_id`,`time`,`username`,`gid`,`guest`,`client_id` ) VALUES ( '48f02e4220f324f5875886cd057e0d69','1256108992','','0','1','0' )
I looked at Site down:1.5.2. DB function failed with error number 145 but I don't use MyAdmin.
My host is my cousin I can't get hold of him because his phone is broken. I have very little server and database experience, work mainly with html, css etc. So I hope you guys might help.
When I click on MySQL Database Server I may edit other databases. But the one I need only says: SQL show index from `jos_session` failed : Table './liv_laga_2/jos_session' is marked as crashed and should be repaired
How may I access and repair this table?
Please take a look at the screenshot attached.