I am developint COM addIn for excel 2003 using C# and .Net 2.0 interop.
In the code I am sibscribing to excel events like open, activate, etc.
It looks like it causing problem with any VBA addin installed that uses same
events.

For example if you have "Lookup Wizard" addin from Microsoft - after you
click Tools\Lookup so wizard form is shown, when Excel is closed you would
get password prompt. If you don't open any VBA addin form - then not prompt
will appear.

All objects in my addin are disposed and cleared (including events), host
app domain is closed, but password prompt still appears.

Any idea what could be the problem ?