Which begs the question, why are the directors not buying shares...

Which begs the question, why are the directors not buying shares in their own company, if they know what's around the corner? This would give greater confidence to prospective investors? At the current sp level the directors should be scrambling over each other to secure as many as possible before an explosive announcement?
When was the last time one of the directors bought shares?

Look what happened at Mantle Mining. The directors bought more shares each around Dec 20, sp approx 5c and within 5 or 6 days the sp hit 29c. They have options to convert in March from memory and i'd assume the sp will respond to this again as it always seems to. If ESI directors believed in what was going on behind closed doors then they should show this and buy shares. Now is a good time. It would give prospective investors more confidence. Don't you agree?