URGENT! Midi setup help needed

Hey I hope someone can help me out. I have a gig tomorrow evening and need to sort this out.

Okay, so I've got a midi keyboard with just a midi out. Then I have an MPC 1000 and also a Roland SH-32.

I use arpeggio sounds with the SH-32 but they're not in sync with the mpc 1000. I need the arpeggios to be in time with the mpc.

Is this even possible? Am i making sense?

It should

How do you have your midi hook up?

the midi out of your mpc should be hook into your Roland SH-32 midi in.

I never use a Roland SH-32 but there should be way so it is use as a slave.
Like on my zoom streetbox i have to set the midi in to exit so when i press play on my mpc it in sync with it..