Using Office.CommandBar

I am trying to use Office.CommandBar - I have it on a userform - that is shown as VbModeLess. It works fine when I Activate the userfrom - However I have another userform running as well - so when the other has focus and I now go back to the one with the Office.CommandBar - I get an error.

I am wondering if somebody has a good example of how best to use Office.CommandBar when switching between userforms and both userforms are loaded.
Thanks
Rasm

Rasm, can you post this file? Seems it would be easier to comprehend the situation if you had those two forms visible

Fox
I have moved the code into a separate xlsm file - But I cannot reproduce the error in a consistent fashion - it happens but in an erractic way. So until I can reproduce the problem - you cannot do anything - unless you can see me doing something silly.
Thanks
Rasm