DarkRP printers

I have a problem with my custom money printers.
When I try to buy them, the system takes my money but does not spawn the printer.
I was following this tut: http://www.youtube.com/watch?v=kFaPkZCZEpQ

I don’t know what the problem is.

Does it give some kind of error about .dt?

You forgot to add the entitie file in gamemodes/darkrp/gamemode/entities/entities
or: gamemodes/darkrp/entities/entities

I forgot but anyway find entities.