Samsung Galaxy Ace flash player problem

I own a samsung galaxy ace s5830i device (android version 2.3.6). I cant view any video that requires flash player. I always get the message '' this content requires addobe flash player, which is not supported by your device ''. I tried to follow this instructions (  http://forums.adobe.com/message/4675670#4675670), but no matter which version of flash player i download and try to install, i always get the message '' application has not been installed ''. Is my device not supporting flash player? Or am I doing something wrong???