Ballahooligan

Spoke to Anderton's, taking it back in for them to have a look at on Saturday. They think it might be something wrong with the pre-amp. Thanks guys.

Sorry - the title was a little dramatic. The pre-amp works fine when not plugged into the pedals but I don't get any output at all when plugged into the pedals. Doesn't do any damage to the pedals, just won't work; switch the pre-amp off and its fine.

I recently bought one of the Sire V7 basses with the 18v pre-amp but when I plug it in to my pedal board it will only work when I have the pre-amp switched off. Works fine with my other active bass which has a 9v pre-amp. I've got the pedals daisy chained from my Boss tuner pedal but don't think the daisy chain is the problem. Even if I use the power supply to power one pedal it still doesn't work. Any ideas?