Screen Resolution viewing Flash

Ok. I have done a site in Flash and it looks pretty good in all Screen resolutions except 600 x 800. is there a way I can make it look the same in all screen resolutions? If I make it look good in 600 x 800 it looks horrible in all other resolutions. What should I do? any suggestions? It looks best at
1024 x 768

Thanks. You guys are great!