Questions about maya for animation


i am very new to maya . i am using maya 2018v6 . i have referenced a rig into my scene .when i pose the character and when i move to another keyframe the rig goes back to the pose I first made . i tried saving the reference and make another keyframe and save again to see if the software records my keyframes ,it doesn’t work . i need help…if anyone could guide me through this situation it will really be a helping hand.