mysql table error

[yogster]

Error
SQL-query :

SELECT * FROM employees LIMIT 0, 30

MySQL said:

Can't open file: 'employees.MYD'. (errno: 145)

I seem to get this error a lot with few tables in my database.
I have to run the repair query all the time in order to fix it.
Can anyone tell me what causes this error?

Thanks in advance!

[svnfightsvn]

you probably don't need the ' ' single quotes around your table name 'employees'