Trigger?

We have a situation were I need to add a trigger to a file to circumvent
a problem.  We should really fix the bug, but this is a temporary
situation so it has been decided to try this approach
.  
We have a file that in certain situations is updating a field, as a
result of this field being populated, other processes are being
affected.  
So the idea was when a record is inserted to have the trigger program
CLEAR this field.  I have tried to accomplish this directly in the
trigger program(both before and after the insert) and also, in a called
program from the trigger.  

Does this sound like I can accomplish this in the trigger.  If so, what
should the approach be. 

Michael Smith
iSeries.mySeries.