Can't get Craftsman Chainsaw(42cc C944.418460) to idle?

My chainsaw was getting very hard to strart. I pulled the carb off and cleaned everything. I have not yet changed the diaphram, but everything looked in good condition. All fuel filters, air filtes are clean. The muffler is clean. I set the carb to recommended specs( idle screw to about 4.5 turns from all the way in), the the low & high air mixture screws are both out 1 and a half turns from closed. But I can't get the machine running. If i pull the choke out, and push it back in the motor will run, but as soon as I pull the throttle and let it go the motor dies. Any suggestions.