hi davyc
I am having similar problems! having done a search of the forums I found out that you seem to need v2.2a installed and the main button assigned to "alternate static source" and NOT prop deice!!
however I tried this and still cannot get the main button to work!! I am running fs9 though - but that should not be a problem. suggest you try reassigning main button to "alternate static source" and see what happens.
also be grateful if anyone has any further suggestions as to why I still cannot get the main button to work, the secondary button is working as it should afaik.
cheers
martin