E brake getting stuck on my Mada MPV 2004
 

I can heard loud noise at the driver side rear wheel when moving, and found out that the parking brake inside the rotor is getting stuck(even i put the lever down the parking brake is still halfway on by the way its only on the driver side). I took everything apart except the parking brake shoes, it looks complicated, if you can help me or give a copy of a braking diagram for MAzda MPV 2004 that will be very helpful so I can buy the right part for it.:( thank you