I always load the chain file first, though I don't "think" it would matter. I figure that I'll get the correct operating environment set up before loading the sound file.
When loading the chain file, it's important to power cycle everything after the load, leave it off for at least 30 seconds. You'll usually hear some code beeps as it powers down, and again when you power it up. I power cycle on both ends as I load the chain file first.
