O function not work on Signal Entry API

When using Signal Entry APIs, the O function does not work.



http://www.collective2.com/cgi-perl/signal.mpl?cmd=signal&systemid=32820392&pw=flounder&instrument=future&action=BTO&quant=1&symbol=NKU8&stop=O%2B5&duration=DAY



or most other futures I have tried, become a market order only. It should become an O+50 order. I have tried this in many different ways or forms, but it seems the O function does not in the Signal Entry API



If I directly use the O function in the trade entry screen, it works fine



Ciould you check the logic, and see if anything seems amiss?