now I use PlayAnimation function , it worked.
FName anis(“/Game/FirstPerson/Animations/FirstPerson_JumpLoop.FirstPerson_JumpLoop”);
UAnimationAsset*animIns = Cast<UAnimationAsset>(StaticLoadObject(UAnimationAsset::StaticClass(), NULL, *anis.ToString()));
testMeshCom3->PlayAnimation(animIns, true);