I have no idea what applets you are talking about. Plus without analyzing responses from the server, it is next to impossible to solve the problem unless you elaborate it.

If you just upload FLV files to a web server, they should work just fine. You may need to set up your web server so that it sends proper headers for FLV files.

You can use an embedded streaming player if you like. It might be a good replacement for a streaming server if you don't have many viewers.