Used Flash Player w/o a problem for a long time on Mac OSX 10.6.8; recently, I downloaded the latest version. Then, no sound on videos. I uninstalled my Flash Player, and the Adobe check showed a blank screen - no plug-in. I downloaded the new Beta format, but for some things, no video and/or no sound. I uninstalled again. Installed 11.7.700.202. Now everything says, "Blocked plug-in." Pls help this non-techie out, step by step. I use the computer a lot, but am not tech savvy, so please - step by step help. Thanks!