Photoshop :: Major Color In CS5 Very Specific

When I first got CS5 I was having problems with color management.  Not sure how to explain this, but the colors in the preview pane differed drastically after I clicked on the photo to edit . That is, as soon as I clicked on the photo I wanted to edit, it turned out  much duller.  the reds suddenly become brownish orange. and they're not raw, so that's not the problem. Although I shoot in Adobe RGB I set the color management to SRGB and (I don't remember what else I set) and when I clicked on a photo to edit, I would get the message where I had the ability to discard the icc  profile (no color management) and that's what I chose.  there were all my rich colors, and it was worth the hassle of doing that with every unedited photo. 
 
I turned CS5 on and everything had changed. Now I'm back to seeing the dull colors in CS5, even the one's that I already edited.  I have some photos with rich red, they're fine on my website, but in photoshop dull brown.
 
I'm temporarily back to using Corel, because for some reason it has no problem displaying the correct colors. So it's something going on with PS.  I think somehow, though I don't know how, maybe some setting got changed.  But am desperate.  I've tried all sorts of combinations. using the adobe setting, switching things on and off and dull, dull, dull.