Rhodes Chroma Polaris

hi
im having a lot of trouble understanding what sysex data i need to send to the polaris .
i have read the midi manual but am still confused. 
what data do i need to send ?
for example i have tried :

F0 (sysex start) 08 (fender manufacturese ID) 03 (polaris model ID) 0Css (press switch 
number ss) 7F (sysex message ends)

thats :

F0 08 03 0css 7F

i must be missing something valuable as this fails to work . 
could anyone help me with this . 
id like to access all the panel switches of my polaris via midi sysex and implement into an 
editor. 
thanks for your time again.
peace
alex