Interesting. Impaqt recommended telling what all the involved equipment was and you asked why.

If you don't understand why something is behaving as it does, a complete description of the problem is usually needed to see the answer. For instance in this case, the brand and model of AVR might have mattered. Or if you weren't using an AVR, that might have mattered.

I wrote my signature maybe eight years ago after actually counting a THOUSAND times when people didn't tell what equipment was involved in the problem and the solution came quickly after they told us.

Then again, asking a really good question is a bit of art. It helps to think to oneself "if I ask this question exactly like this, what are they going to ask me that will pin down the details of the problem?" Often, if you do that, you'll realize the answer.