Milkshape 3D: Fixing crotch world model turns model into error?

Im having some problems in Milkshape 3D trying to fix the crotch gun bug for a CSS weapon. Whenever i upload the model to the workshop and test it in Garrys’s mod or view it in HL2 model viewer i only see an error? Im doing the excact same thing as SimonovaSKS tutorial

(His video: https://www.youtube.com/watch?v=w6lQSt_v3rs)

Does anyone have an idea of what i might be doing wrong? mabye i messed up the QC file?

Model viewer:

QC file:

[editline]11th January 2017[/editline]

UPDATE: it sort of works now…