Flexes wont reset

[Albin (no sound)]

Hi. I made a mustache for sniper. It does have all the flexes however after sniper performs his facial animation the mustache wont reset to snipers default pose. I've compiled the model via the ingame importer and Ive exported it as an DMX as the importer docent support VTA files. does anyone know how to fix this? I used a decompiled sniper model as the base for my mustache so the flexes are from valve and they work fine in blender.

Here's a gif of what happens:

https://drive.google.com/file/d/0B9VEJQAN3petNzB1Q2JmVXdHR1k/view

And here's the model in blender with all its flexes:

https://drive.google.com/file/d/0B9VEJQAN3petZVhoX2dzMy1BbVk/view?pref=2&pli=1