Subform Parameters Not Working on Main Form

I'm working on a database for a clothing order, I have a main form and a subform. My main form contains the information of the employee who is placing the order and my subform is a continuous form that contains the details of the order.

My subform contains multible combo boxes that pull their values from queries of earlier combo boxes.

Here is my problem: when I open the subform by itself, everything works perfectly, but when I put the subform on my main form I get a pop up asking me to enter the parameter value.

Any help would be greatly appreciated, and if you have any questions I can provide more details.

Thanks everyone!