instruments set syntheziser

I have installed the instruments set sitheziser on a external harddisk.
Can anyone explain to me how I load this set in halion one or even better in halion 4 or halion sonic
When I open up these programs I cab get acces to the different soundsets I own but when I drag and drop them on the virtual keyboard I can;t hear any sound. I asked steinberg but they din;t come with a good solution.
Can anybody help.