>>Have Button inside container, inside another container.
>>TreeviewAX is also present.
>>
>>Button click would not fire.
>>
>>Any ideas ?
>>
>>TIA
>>Sergio
>
>Any chance that either of the containers are Disabled?

Huh that was it!

There was infact line of code disabling it.
My mistake. I was almost 100% sure I removed all of those ...

Thank You All :)