Garageband Tempo sync with Downloaded AU

Hi, Ive downloaded a mac AU called Tyrell N6 which is a synth.

I also have a downloaded drum sample from Loopmasters in itunes that I want to use with one fo the sounds from the Tyrell synth.

The drum sample is 75BPM and the Tyrell sound is an arpeggiated preset which dosent give its tempo and there is no Tempo button in Tyrell to match it to the drum. Ive tried altering the LFO rate in Tyrell which is altering the tempo of the sound but its not exact.

Does anyone know how to match external drum samples to external AU's in GB. Thanks in advance.

Paul