Managed to get it work but only if I removed the DTV STB from the connections list which is connected to the camcorder input, then it worked but if I put the DTV back in the SKY+ works but not the Apple.
Here is a list of the connections used
VMEM-DVD (sony)
AV-DVD2 Wii
DECODER-STB-VAUX (Mac Mini) set to apple remote
CAMCORDER-STB-DTV (SKY+) set to sky+
Really not sure why this is happening but very frustrating hopefully someone can shed some light on this issue.
Regards Simon