I bought a "macro extension tube" on ebay... Just curious to see what it did, so I didn't want to spend too much on it... Got it today and hooked it up on my kit lens ( just in case...because its the crappier of the 2 lenses I own) ANYWAY, I hooked it up and it was useless. I got an error like ... "Lens not attached" or something along those lines. What was I doing wrong? ... or is it just a Piece of S**t! haha. anyone ever have this issue? Advice?