Absolutely don't worry about it. You're not cocky, just new - it's not exactly a stretch of the imagination to think that you're not familiar with the workings of the forums. It's all good. Dexter doesn't often reply, but when he does it's in the most unlikely places, so I wouldn't exactly be surprised if he replied to your thread.
Also, if you make music and are interested in sharing it, check out the Your Band forum. My music, along with llamas, are also up there. Enjoy and welcome to the boards!