I'm trying to configure a flex I/O rack and ran into a few problems. The PLC is a 1756-L1 it's running REV 13.24. I configured the 1756-ENBT module and branched down from that is my 1794-AENT module. This is all seems to be working fine. When I right click on the 1794-AENT module to add a new module the 1794-IE12 module is not in the drop down. I'm guessing I'll have to configure it a generic flex module but I'm not sure. Anyone out there with experience in this area, any help would be greatly appreciated.