Well it takes males longer to get on baby food/fruit than it does females. My male wouldn't eat friut of any kind until about 6 months ago, and he is a year and a half old.
Just kep putting it in there for him and offer him crickets as well and sooner or later he will probably catch on.
Some Cresteds dont even eat fruit, you just have to be patient and keep offering it to him.
Now that is the only thing my crested eats, I have a bunch of baby food in my cabinets and I give him fresh everynight, every now and then I will buy him some crckets and he won't even eat them so I have quit doing that, so I offer him meat baby food every now and then for the protein that he needs.
Hope I was of some help, if not there are a lot of people that know their fair share about reptiles on here!