Good chance that since this is working in IE and not in Firefox and you are trying to do some authentication ( hence post_params: { "ASPSESSID": "" },) you are hitting the flash/firefox/opera "bug"/issue. In this case the flash uploader is actually running in its own context and not in the shared context and can not acess the cookies for the sessionID.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.