Robot Ouputs not controlling my gripper solenoids

[ESP666]

Hi

On my training course for the fanuc robots (2 wks ago)the grippers were all controlled via robot outputs.
I've tried the same thing with this 420-iF, using the RO[1] = on,RO[2]= off etc.. to get the solenoids to fire, but they wont.
There are 8 RO[n] defined on the TP the rest are not defined (of 24 i think).

Am i missing something here?
RI and RO are pre-assigned so why would they not work?
Would a gripper be wired into any other type of outputs?
I have just remastered this robot, it hadnt been turned on in a long time.
I dont know if there was software for this gripper on robot prior to remastering.
any ideas would be great
thanks

[tc429]

never used a i series- in the old Karels you have to set the user signal assignment table values for the I/O. I havent even setup a R-J in long enough that I dont recall if they needed them or not- anyway in the old Karels $USAT[87],[88]& [89] were the ones that configured hand#1...the first word says what slot the cards located in, the second the start address, and lastly the type of output- maintained/pulsed/etc...
imagine similar settings are required for the newer ones to tell the control what kind of hand you have mounted?