No Midi Signal after 30 mins

hey i am using a cubase 5.1, Roland Quad Capture audio card via USB

i have a RIngway TD 82 elecronic drum kit that connected to my computer via usb
when m turning on my computer and getting in to cubase and using the drums its fine
but after 30 miutes taht my computer is on it doesnt get any midi signal
how do i keep my signal to last longer the n 30 mins??

Mac or PC?

Sounds like USB power saving settings. Your PC is cutting off power to your USB devices after 30 minutes to save power because it thinks you’re not using them.