Hi, I am a new mac user, using a 2011 MacBook Pro 13", OSX Lion. Recently, i downloaded and installed a third party screensaver, but it does not work the way i want it to. 1.It cannot be activated via Hot Corners, no matter which corner i use, neither can it work after 3 mins of inactivity, which is my current setting under system preferences. By this, I mean that the screensaver crashes in less than 5 seconds, and brings me right back to the desktop. But as I've ticked the show clock option, the digital clock does appear on a black background, for about 1-2 seconds. 2. The preview screen on the settings app, while usually showing a preview image for preloaded screensavers, comes out black for this particular one.. 3. Using the "Test" option on the settings app, the screensaver works perfectly. 4. Strangely enough, locking the screen using "Keychain Access" calls up the screensaver, as a login background, although it disappears after awhile, unlike the windows version, where it runs continuously. 5. Only the third party screensaver does not work, the preloaded ones do. However, I am inclined to believe that this shldnt be a compatibility issue? If it was plain incompatible, why is the screensaver working through "Keychain Access" and using the "Test" function? Additional information: the screensaver is by Daum, a korean search company. Please advise me on what are the possible troubleshooting methods i can try! Any assistance you can offer is greatly greatly appreciated! Cheers!