Connect Alesis SR-18 to sintetizer

I am trying to connect a Reverb Big Sky pedal to the Prophet REV2 and this one to an alesis sr-18 box that connects to two amplified monitors.
I can not make it work. The idea is the synthesizer sounds to the pedal and this, send them to the rhythm box as the last output element, in order to get the sound with the effects to the box.
If you can help me I would be eternally grateful.
1 person has
this question