I wouldn't worry about it. Ausaudriel is often busy with the more technical side of PC and with real life stuff, so it might take a while for him to get to PM's. Just be patient, if it's important enough, he'll get to it eventually. If it's not that important, let's just say that I haven't recieved a response from a PM that I sent a month ago. XD
Don't worry, it wasn't important, so I don't blame him. I don't think you're on his ignore list or anything, so don't sweat about it. :)