Sansa clip keeps disconnecting

Ok guys I got a question. Ever since I upgrade the firmware from the original to the latest Ive been getting problems with my clip disconnecting from my headunit in my car. I only use my clip to play music in my car and everytime my Pioneer headunit trys to connect to it it always will say writing and then disconnected even though I never unpluged it. It never did this before I installed the latest firmware. Usually it will still work after a couple of seconds to minutes of it writing and then disconnecting. Sometimes I will have to reset it for it to work properly. I was wondering is there anyway to restore back to the original firmware or anyway to fix this writing then disconnecting problem???

Do you need to set the Clip’s USB mode under Settings?  If I recall correctly, that gets re-set to Auto when you apply a new firmware.