what the heck is going on?

[ctgirl]

So I'm playing with a photo I took tonight and I'm tring to use the spot heal brush and it just won't work. I've used it plenty of times before without fail, even opened a different photo to make sure and it works on that one, so what's going on? So far I've done a levels adjustment layer, I copied an eye so added a new layer with that and just some cloneing. I flattened the image thinking maybe that would help, it didn't, I undid that then tried to merge levels, that didn't work either. I also tried using my paint brush to see it that worked, but it won't, the eraser and lasso tools work, what am I missing? Thanks for any help you can give me, and sorry if I'm just missing something obvious, I'm still new to photoshop :o

[ctgirl]

The hardness is at 100% the spacing is at 25% (I've have no idea what that does, but have never changed it) and it's on normal mode...
This is driving me nuts...

[ctgirl]

Thanks for the help, I'll check it out now...
no everything's still right, the part that gets me is that it works fine with any other photo, could I have messed something up with my layers somehow?

[tim]

Blending mode.
Check you're on the right layer.
"Sample all layers" checked.

[ctgirl]

Well, I have no idea how but it started working again, accually the paintbrush started working first, thanks for all the help guys.