any way to use a 16 gig card with stiletto2?

Hi all, I have been using an 8 gig micro sccard since I got my stiletto2. I wanted more space and bought a 16 gig card but have not been able to have my stiletto recognize it I guess and use it. Is there a certain way I need to format it or anything to get it to work like the 8 gig? Or is it just too big to use on there? I have tried many different programs and ways to format it and still no success, any help would be apparciated, many thanks. darkjedisjb@aol.com