odd flash issue

so i have a development server running version 8.0.1.195765 in multiserver mode. i have 13 different servers running. however some of them wont build flash content. is there some setting that I'm missing in IIS or Coldfusion. Its driving me nuts ive done (as best as i can) a side by side comparison and I just cant find anything. Has anyone else encoutered this

Thanks,

Adam