# Flash Player 9r45 Compatibility **URL:** \ **Category:** flash\ **Created:** [June 30, 2007, 4:33pm UTC](https://forum.kirupa.com/t/flash-player-9r45-compatibility/230966 "2007-06-30T16:33:15Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![K2xL](https://avatars.discourse-cdn.com/v4/letter/k/59ef9b/32.png) [@K2xL](https://forum.kirupa.com/u/K2xL)\ **Post date:** [June 30, 2007, 4:33pm UTC](https://forum.kirupa.com/t/flash-player-9r45-compatibility/230966/1 "2007-06-30T16:33:15Z")
So I’ve been building a relatively large AS3 application which runs perfectly fine on Flash Player 9r45. However, if I run it in Flash Player 9r28 or anything less, it simply doesn’t work. It’s very strange but it seems like as soon as I call a function on any class (i.e. preloader), the Flash just… stops… It’s very difficult to debug, and I’ve been using this firefox extension to switch flash versions. I took a look at the version changes, and I’m pretty sure my flash isn’t encountering any of the following problems… [LIST] [_]New ActionScript 3.0 components for Flash CS3 Professional do not function correctly in versions prior to Flash Player 9.0.45.0. [_]Runtime Shared Libraries (RSLs) exported for ActionScript 3.0 generate a runtime security error. (195395) [_]Display objects instantiated by the playhead entering a frame because of a gotoAndStop command (or similar action) incorrectly process actions on frame one. (189490) [_]flash.text.TextField.getCharBoundaries returns a rectangle that is offset to the left by 2 pixels for fields that are created using the Flash CS3 Professional text tool. (193249)[/LIST]Although I am not 100% what the **Display objects instantiated by the playhead entering a frame because of a gotoAndStop command (or similar action) incorrectly process actions on frame one** means… Any help? Any ideas? Thanks, -Danny