Triggering Korg volca thu Midi

Im trying to trigger a Korg volca Sample2 with my OP1…but no sucess…OP-1 midi OUT to Midi plus Host IN…Host midi OUT to Volca MIdi IN…both set to CH-1 and Golbal setting (volca) to recieve midi…also tried all the sync beatmatch and other setting on OP-1…but funnily it worked a couple of times but just stopped after trying again…something Im missing?..the Midi Cable is new…soooo…???

USB Midi Host didnt have enough power via computer, Kenton Host works fine with 240v power