Could you try following the instructions in the tutorial exactly? I am being serious when I say I followed the instructions exactly the first time and had the results I expected the first time. I used whatever the latest version of Dev-C++ was on the bloodshed sourceforge download page earlier today. I also download the latest version of the mingw-devel-sdl. The download link for sdl is part of the tutorial and it says where to extract everything and also how to set up your Dev-C++ project. I would recommend SLOWLY reading the tutorial and NOT cutting corners. You are wasting a lot of your time trying to make things "easier". I already mentioned earlier how your include should be #include "SDL/SDL.h" The only time people tend to use the include line without SDL/ is when working with Visual Studio, simply because Visual Studio is usually a special case type of IDE
EDIT: Just as a suggestion 6+ bumps within a timespan of close to two days is at least 5 too many bumps, in my opinion. It is just a silly way of increasing your post count, and takes away the top slot from the most recent question asker. Just please use a bump sparingly.