I also have a Cass Creek Predator call. They are a good call, I just upgraded to a Foxpro because of the different sounds you can get loaded on them. If I was using the Cass Creek this time of year for most stands I would use the Fawn, and rabbit sounds for bear and larger cats and rodent sounds for fox and bobcat. But don't be surprized to have bobcat come into the other sounds as well. I would bet your not doing anything "wrong" just keep calling and watching you may be surprized. If you want after this bear hunt maybe we can meet out in the field someplace and do some calling. I live in Sahuarita south of tucson but am willing to do some driving to meet up with you for a day or so of predator calling. If you have a calling club I would also say join as most clubs have people that are very good and willing to help out as well.
AzTrapper