I agree with Dave,them can be boogers to bleed,even the factory setups.
Sometimes if you are sure its bled and still no pedal, just leave it sit overnight with the reservoir cap off and it'll sometimes burp itself while ya sleep. A few I've had to inject fluid with a big hypodermic thru the slaves bleeder. Also make sure you have the rod from the master to the pedal adjusted all of the way out so you get the most stroke on the pedal. After you get it bled then adjust that rod to about 1 to 1.5 inch of free play.