"trade price" not copying over??

I am attempting to use the "copy to category" feature on the attributes controller. I have 8 different sizes of sweaters with different prices and weights for each one. Everything is copying over perfectly except for the trade price. I'm baffled as to why it copies everything except this. My only option right now is insert the trade price for each size on my 35 different products seperately but obviously that will take a hell of a lot of time. Does anyone know why the trade price won't copy over?

Thanks :(:(

Zen Cart doesn't have a trade price.

It sounds as though you are using a add-in module that adds and uses it in some circumstances, but which hasn't been properly written to ensure that it's taken account of when using "copy to category".