Thanks for the replies guys,
To make myself a bit clearer by global I think I should have said multi point entry. Re the pressing of the two buttons together I have done that and yes it will go from drivers door only or all doors but still won't unlock the tailgate. I have tried (I think) all combinations etc but it always requires the tailgate button to be pressed to open it. On closing the indicators do flash.
Hope that makes my problem a bit clearer.