--on what your functional disability is, how it is described, what backup documentation you get from health care professionals, and probably also on your age (the Social Security folks are disinclined to aware full diability to younger people, just because of the assumption they'll cost the system money for many years . . .)

We do have a Scoial Security Disability forum where you might want o post in detail and get advice from some of the very knowledgable people there:

http://neurotalk.psychcentral.com/forum28.html