New to making a Mold

Hello

I am trying to make a mold of a part. The part was done in Pro Engineer and imported into SolidWorks 2012.

I have managed to get up to the Parting line command and then it stops saying that it can't "knit".

I've attached what I have.

Thhank you for your time

Jim Healy

SolidworksPlastics And Mold Design