Hello,
Unfortunately, the NI-DAQ driver command SCXI_Calibrate does not support the SCXI-1124 module.  You should follow the steps listed in the SCXI-1124 User Manual in order to perform a calibration.  Chapter 5 in the User Manual covers the calibration procedure.
The User Manual can be found by going to www.ni.com/manuals.
Regards,
Justin Britten
Applications Engineer
National Instruments