You need to load genesis clothing via PCF (Poser Companion Files). You install those into the runtime where you have you genesis installed. The PCF file instruction DSON to load the genesis clothing (which are in DUF format) and convert them to something poser can  use.

So you need to install both the triax install files (this is the DS version of the cloth) and the PCF installers

If there are no PCF files you need to make them in DS4.5 or 4.6. But you better ask that in the Studio forums. That usually works, but not for all clothing items