Mcp again

Well i have lots of new stuff installed and i am begining to really enjoy flying my sim. I have the opencockpits mcp and default 737 in fsx, using freefd for my glass instruments.
On the mcp i press alt hld and nothing happens. If i press v/s i get alt lit up in the virtual cockpit but v/s lights up in the freefd software.
I have the latest sioc 3.52 and i have used the autoconfig whatsit :D

I know its a software issue and probably simple to fix but it has me stumped.
With the test program the button works fine and lights as it should.
Can fsuipc help with this? Please help, and i have read 82 pages of the open cockpit forums, Only to find one person with the same problem, but nobody replied to his post :mrgreen:

Thanks Steve