Moscow is behind us - need help
 

I havew big trouble to get to seconds stage of this mission. IS there any condition trigering it? I have seen walkthorugh video and the guy had objective completed quite fast, he shoot meaybe 2 panzers IV whiled i shot already 8 and killled over 200+ infantry but i am getting overrun since they are more and more
I set my troops on treneches using both mchine artilery. Have 2 at guns on both sides and also 45mm gun helping taking out vehicles, i take out flak cannon fast. I have no idea what i am doing wrong.