A quick guess or two, since you haven't really explained the symptoms.
Are your Flow and Density sliders set to something reasonable?
Try hitting the H (for hide) key.
Is the Size slider set to something large enough?
I'll only charge you $25.
Thanks. All of the options like skin softening, teeth whitening, etc are gone. It doesn't seem the brush is doing anything. It gives the option of changing exposure, contrast, brightness, etc. I'm not a techie person, so I don't know if this explains more of what is wrong. Any help is very much appreciated. I'll take the $25
Thank-you! It worked.