In my code I have successfully logged in, started a freebusy session but when I go to retrieve the freebusy data I get the error "59905 - Bad parameter passed to a NCSP function"

This is the data that I am sending.

<soap:Envelope xmlns:soap="" xmlns:xsi="" xmlns:xsd="">
<session xmlns="">nsWhpPbyl71v47Tk</session>
<getFreeBusyRequest xmlns="">

Here is the kicker, I can take that same packet and put it into TCPmon and submit it and get the data back. I have no idea why it's not working inside of my application. using coldfusio and CFHTTP, Groupwise 7.0.3

any help would be greatly appreciated.