Ascension Freezes when adding Containment bridges. Help

[Fyler]

I open entity drap the Containment bridges tag into my acsension. Then I duplicate a sniper so it says "Sniper[1]". Then I go and clone 5 snipers. After that I change the 5 snipers I made and change then to "Sniper[1]" using the 'swap' option I save it and sign it and try to play it but it always freezes. What am i doing wrong

BTW, I used the tut "Add 'stuff' to any map using entity" (Something like that)

[a mammoth]

don't dupe the weapon, clone the itmc , then change it to the containment gate mach.