Error 400 on SERVER: Invalid parameter duplex

[Heliophobe]

Hi, I've been trying to set this up as per the readme, and this error crops up
Error: Could not retrieve catalog from remote server: Error 400 on SERVER: Invalid parameter duplex on Printer[UTprint]...
if I include the line
duplex = 'DuplexNoTumble'
So, I figured I would try to get around it, and since the command
lpadmin -p utprint -o Duplex=DuplexNoTumblehave the line
works, and the options => { } parameter is suppoedly handed off to lpadmin -o, I tried this
options => { 'Duplex'=>'DuplexNoTumble', }
With no luck.
Is this an issue with the readme, or something else?

[Heliophobe]

This seems to have been resolved by using ppd_options, not sure why this failed previously.