Most browsers have helpers installed to decode binhexed files automatically. There will be some delay while the server processes the file. Then the browser will download it and decode it. Auto BinHex Plug-In will automatically encode the file before sending it back. If the file name ends in .hqx , it will be served without encoding.
Encoding can take several minutes if the file is large.
When the file is finished encoding, it will start to download through the browser, and you'll see an entry in the Web activity monitor window, and in the log file. If you dislike the delay in encoding, you can use a program such as StuffIt Deluxe, and encode your larger files manually.