Access ODBC 'write Conflict' SOLVED!

I had this problem where a user would attempt to change a record, and
always get the 'write conflict', and that another user had changed the
record... even though no other users were on the database.

I searched high and low for a solution, to no avail. Yes, I had a
primary key; I had a TIMESTAMP field. I played around with Access'
settings for record locking, no record locking, etc.; I set the MyODBC
setting to "return matching rows". None of these worked.

Here is what I found:

I had a TIMESTAMP field in the MySQL table, NULL = OK. I imported data
from a text file into this table. This text file did not have the
TIMESTAMP field, so all of the records in the MySQL table had a
default timestamp of '00000000000000'.

I wrote a SQL statement that changed this TIMESTAMP '00000000000000'
value to an arbitrary value (for example, '20030910134340').
Everything worked fine.