.Map :: MoHAA Mapping

I've tried the tutorial : MG42 with a Spotter and I had a problem and I don't know why
When I've done every thing it says in the part 1 I don't have any enemy who come in the map and shoot me with the MG42 and I don't know why :/
I've done every thing sayed. I've redone the tutorial twice and still ...