stock stereo unit

I had an aftermarket unit in, until it got stolen, so i put the stock back in. So now it seems to want to "reset" itself whenever i turn the car on/off. The thing is it, resets, itself but to 1:00, and resets the cd player (doesnt remember track number, restarts cd), whenever it is on cd when i turn it off and turn it back on, it turns the unit off. The weird thing is, it remembers all the radio stations. Anyone know why it could be doing this. The only thing i can think of it the power in the back of it, but then if it was this wouldnt the radio stations be cleared? Also the cd player has been getting alot of err 20's lately.

i found out that it was the battery and it kept going to one cause the built in back up power, in the actual head unit (stock so it saves radio stations, etc, when u replace battery)

I have the same problem going on right now and I was wondering if you found a solution?

yeh i posted a reply, it was cause of the battery, it didnt have enough charge, and the time was being reset by a battery in the head unit (back up power)