debug engine, breakpoint with passcount

with my custom debug engine, I can set breakpoints with a passcount and they are hit as expected. However the hitcount in the breakpoints window of VS is not updated. When a breakpoint is hit but hitcount <> passcount, I send an

IDebugBreakpointEvent2 event with attributes = EVENT_ASYNCHRONOUS; execution then continues, but as said before the hit count is not updated.

What am I missing?

Regards, Jan

Jan