I don't know too much about the azureus, but im guessing that your male isn't ready yet. His lack of calling is a good sign that he's not interested. You might want to try and raise the humidity. Also, you might also want to find a clip of some leucomelas calling and see if the male will feel like he's got some competition, and he might start up. You never know though- sometimes it's just being patient. For me, i'm the exact opposite. At first i thought my female auratus was ready to go and that none of the males were mature enough yet, but last night i heard one of my my males call about 4 times or so. I checked for eggs this afternoon, and none to be found, so apparently i guess my female is either not ready or just not intersted i dunno. So just give it some time, he'll probably come around sooner or later.
Best of Luck!
that's my two cents-- whether it was worth it or not
Kasey Lawrence
3.4 Hawaiian Auratus