Form Boundary Issue with Coldfusion Servers

So I have a strange error that occurs on Adobe Coldfusion servers where they throw a 500 error on the form boundary that soapUI uses on its forms. Our linux railo servers run through this just fine, so I'm pretty sure it is only an issue with how soapUI sends the form to the Coldfusion server.

soapUI uses this as a form boundary:
------=_Part_28_25973640.1370631832804

and Coldfusion returns:
500
Corrupt form data: no leading boundary: != ------=_Part_28_25973640.1370631832804

Looking at how most browsers (firefox, chrome, IE) send form data, they don't use the = sign in the boundary which I think is what throws off Coldfusion. For example, chrome just sends the ----123456 style boundary.

Is there an easy way to setup custom form boundaries?

Thanks,
Steve