director (not)buying

I've traded esi a few times over the last few years. I believe LT it may have great potential however the question that bothers me is why directors never seem to put any of their cash into this baby if the future seems so bright.

I remember this was briefly raised last year when the price shot up to 5.2c but no one really addressed the issue properly. If Esi is truly as good as we all think so, wouldn't most of you agree that directors should be LOADING up now big time. Until I see directors putting money into esi I personally will exercise caution and cannot say this is a LT buy I'n any way, rather a company with a bright future where I will trade on the spikes.