>>>Have Button inside container, inside another container.
>>>TreeviewAX is also present.
>>>
>>>Button click would not fire.
>>>
>>>Any ideas ?
>>>
>>>TIA
>>>Sergio
>>
>>1. If you remove the TreeView, would it click?
>
>I have another container without the tree which clicks first time and then then 'locks up'
>WIll try to remove tree all together and try.

Do you have any other extra stuff going on? Do you disable the button or any of the containers or cover it with the transparent label?