Problem getting dynoed due to Dynatek ignition

[shrimpy21]

Ok whet to get the bike dynoed today and was unable,due to the dynatek.Whats happening the bike runs up fine with the tacho meter attached from the dyno,but as soon as the dynatek starts to advance the ignition,the tacho meter on the dyno goes all over the place due to the pulses.Anyone help with this and why its happening and what can be done.Im running curve 2.They have tried various places attaching the tacho wire but the same happens.
Ive left the bike there and they are going to try and sort it out