Synching Arpeggiator to MPC

[fooloof]

Hello, all. I have a Polar TI2, which I sequence through my Akai MPC 3000. I then run that audio into Pro Tools. I am very new to the Virus line and have not explored any of the "Total Integration" features. To this point, I am using it simply as an outboard synth. I am trying to get my arpeggiator patches to sync with the MPC. I have very little knowledge of arpeggiation; but as I understand it, if I have the Virus set to an external clock (the MPC), I should be able to control the tempo of the arpeggiation with the MPC. This is not happening. Any help would be much appreciated!