Money Printer HELP!

hello gmod community, ive been trying to add koolaid custom printers and ive been having struggles… Im running DarkRP2.5.1 . The printers are compatible with this version.

I add the printers in my server fine but the only problem is when i click on the printer to buy them it doesnt buy it…
The entity name for the printer is money_black_printer.
The cmd to buy the printer is cmd = “buymoneyblackprinter”

Any help?

-Thanks

Does it say anything in console about a missing entity?