I have a large MYSQL database with each inputs handling over 500 fields...

But nowadays somebody observed that are missing records, what before were there.

How is it possible to disappear a record, in MYSQL tables?????????

I have read about LOCK TABLES, i have put in my PHP code where I am writing in database, but still nothing, the records are vanishing, too.

PLEASE, help me, very very quickly!!!!!!!!!!!!!!!!
::::sorry for my english::::