hi guys i have a midi problem. i have a PSR540 keyboard and i have one Trinity Rack. All this time it was workin properly but last two days i had some probs . like whenever iam playing suddenly theres no output. theres no response from rack when i keep on playing in my keyboard. IS this a problem with my rack or some problem in my keyboard . some times my tr-rack says "Midi Recieving error".u guys have ne guess over this??pls hlp thk u B.Praveen