This error is fairly straightforward. You've successfully loaded the Loader.swf file in your Flash Player. It does a bit of preparatory work and then attemps to load the SDT.swf file. Loader.swf will remain active when SDT.swf is "playing"; it will interfere with the SDT game (for example: by adding new elements to the UI) and allow advanced mods to work.
Unfortunately,
Loader.swf is unable to find the SDT.swf file and therefore the game can't proceed.
The two SWF files should be in
the same folder. If you've accidentally moved them around then you could try to re-extract the ZIP file in order to obtain a pristine set of files.
If the files are already in the same place then you could use a different folder. There are sometimes permissions isssues associated with the specialized folders under Windows (such as My Documents), especially if you're running a non-admin account. You can delete the folder on your desktop, and then try extracting the ZIP file into a less special location (such as c:\games\sdt). Try to use the "play SDT Loader" shortcut to run the game from its new location.
I'm concerned about the fact that WinRAR is still visible in your taskbar. You might be dragging-and-dropping the Loader.swf file from the WinRAR window into Flash Player. That will "work", in the sense that WinRAR will extract a temporary copy of the Loader.swf file and then open it in Flash Player. But there isn't a SDT.swf file within that temporary folder, so the game can't actually start.
- Ensure that you've extracted the files.
- Close WinRAR.
- Open Flash Player.
- Drag and drop Loader.swf onto the Flash Player window.