UE4 facial Morph Target error

hey guys, i have some error with the morph target. im use faceshift for my character facial animation, when i capture facial animation in faceshift the result are good, when i export the facial animation to 3dmax (2011) the facial animation look good too, but when i export to unreal engine 4, the morph target was loaded, but the facial animation was terrible, its like the morph was out of value and break the character face

but, i test animate my character manualy and export it to ue4, the result are good, the facial animation was smooth

anybody know what going on?? because its really make my head headache,i do many of test and make sure nothing was wrong when i export it to ue4, but it give me the same result