Dianna,
If you're certain that you have Informix privledges on the
table to update, then make sure that when you created the data
source using OPENLINKS ODBC driver, that you did not select
READ-ONLY as the database selection type.
Also, I know it is impossible to update a table using a view on
another server, so check that out!
Good luck, if you find a solution, write me.
Cliff