Hot Corners not disabling screen saver

Hello folks, Im trying to watch movies and using hot corners to keep my ss from coming on but its not working. Tried disabling/enabling them, all four corners, mouse cursor in different spots but all the same result - ss keeps coming on! Gahh! Any tips or troubleshooting methods? Thanks.

Hi again, Aaron —
OK, let's try some troubleshooting steps to solve your Exposé problem (that's the name of the OS X feature that, among other things, provides the "hot-corners" functionality).
    (1) Please note that some Dashboard widgets have been reported to exhibit incompatibilities with Exposé. You may want to check on this — and update to later versions or disable any suspect Widgets.
    (2) When you have "a lot of things like this" that aren't working as expected, it's usually very helpful to isolate what may be vs. what definitely isn't contributing to the behavior(s). One way to do this is to set up a temporary "test" user account with administrative privileges. (As always, be sure to remember the password!) Then log-in as this user, and take whatever steps are necessary to determine whether the problematic behavior(s) persist. If they do, the problem is "systemic" ; is they go away, the problem is apparently restricted to your user account. Apple's KnowledgeBase Article 25398 — Mac OS X: How to troubleshoot a software issue (also linked above) explains troubleshooting steps to take from there.
For what's next, I'll presume this problem is associated with your user account:
    (3) Exposé, the Dock, and Dashboard are closely associated functions. Because Exposé's preferences are stored along with the Dock's, one step that will frequently help resolve its problems is to remove the com.apple.dock.plist file from your ~/Library/Preferences/ folder (the ~e and / "path" nomenclature are defined here) — either temporarily to the Desktop or to the Trash, and then restart.
Please note that this will refresh all the associated preferences to their original, "default" values — so you will have to reconfigure your Dock & Exposé preferences. (You may want to take a screenshot of the Dock's current configuration first.)
There are other potential troubleshooting steps to try if these aren't successful. Please post back to apprise us of your progress — and to discuss this further, if it remains unresolved.
Good luck!
Dean

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