I have a table that is corrupted. When I attempt to open it, I get"

"Table 'r:\vtc\data\billcom.dbf' has become corrupted. The table will need to be repaired before using again."

I used the technique that Rich Pupko provided in message #1306603, which seemed to work, but the table is now corrupted
again.

I don't know much about corruption. What can cause this? What can I do to fix it for good?

Thanks