Lip Sync doesn't work

I upload my avatar with sdk2, and I check my mesh blend shape works well in unity and Maya. Check every mesh’s Root Bone and use Hips. And Configure Humanoid’s Head Jaw bone to non. Then I put in to Lip Sync with Viseme Blend Shape Mode and checked if every Viseme was in the right place, but it still wasn’t working after I published.

And I had tried to create new unity project 2018.4.20f1 with the newest VRCSDK2, but it didn’t work either. I use MMD dance stage world to test the lip sync.

I also use another avatar which bough
t online, and do the same thing, but it works well. It confused me for a long time.

I change my mesh’s name From “Head” to “Body” than it worked.