For some reason when I clip an adjustment to a layer, it doesn't work. Before I clip it though, it works fine, it's only when I clip it to a specific layer, it just instantly removes the adjustment and fails to work. (By this I mean it looks like everything is working fine, with the exception that nothing has changed.) For example, I add a brightness adjustment to a photo, but as soon as I clip it to a layer it just reverts back to before and the layer is clipped. Any adjustments I make while it is clipped doesn't work. I must be missing something simple.
Any help would be appreciated.
What version of photoshop and operating system are you using?
Could you post a screenshot with the pertinent panels visible?
+1 to R_Kelly's request, except to add that you'll need to make sure your Layers panel is showing and you'll want to describe how you're mixing the layers in enough detail so that others can understand how it's being mixed-in.
What you're seeing could mean that the way you're combining the layers in the document isn't simple and the other layers are influencing what you see in the composited result to the exclusion of the layer you're working on.