Help with JV-1010 reverb!!!

Please, can anyone tell me why i can't control the reverb depth on my Roland JV-1010 from my sequencer (Cakewalk). I'm sending a controller 91 message with a value between 0-127 but it don't care! Some sounds get a little reverb though, but most don't. Some sounds seem to have a lot of reverb as default which i can't control either.

Can anyone help me???