PTZ with foscam clone

[fennec]

Hi

I have a clone foscam ipcam all is ok but i wan't to control PTZ no zoom just move

so i create

/usr/share/perl5/ZoneMinder/Control/IPCAM.pm from
www.zoneminder.com/wiki/index.php/Foscam_Clones

But i have reponse undefined

for move left i must GET

10.0.0.209/decoder_control.cgi?loginuse=admin&loginpas=123456&command=4&onestep=0&13952742621450.2540162969380617&_=1395274262145

and for stop

10.0.0.209/decoder_control.cgi?loginuse=admin&loginpas=123456&command=5&onestep=0&13952742621450.2540162969380617&_=1395274262145

someone can help me to adapte IPCAM.pm for use PTZ

My setting

Control Type ipcam
Control Device loginuse=admin&loginpas=123456
Control Address 10.0.0.209:80
Auto Stop Timeout 0.70

Thanks for your help and your job for zoneminder