Corrupt Table/Index header

I have a dBase table that i've attached to a TTable component with:

   dtable.active := false;
   dtable.databaseName := tPath;
   dtable.TableName := tName;
   dtable.active := true;

The error I get is "EDBEngine Error with message: 'Corrupt Table/Index
header.  File:...."

Any Ideas?

Thanks.

Michael