[dba-VB] VB6 - control event not firing

Hi All,
 
If anyone remembers any VB6 I could sure use your help.  
 
I've got a developer using a third party combo box whose click or change
events aren't firing.  They'll fire if a break point is set but not w/o
the break.  We changed the control to a list box and same result.  I can
contact the vendor but I'm pretty sure this is VB acting up.
 
Does anyone have any thoughts about how we can get these events to fire.
Rather urgent issue so I'd appreciate any input.
 
TIA
 

Jim DeMarco
Director of Application Development
Hcheq
Tarrytown, NY