Query on ILR eligibility - Pankina case

Hi experts,
I have a query on if i am eligible to apply the ILR now. My case explained below.

I Came to UK on work permit on November 2006, then applied for Tier-1 on September 2008 which got rejected because of maintenance funds and went to my home country. 3 months later I came again on work permit to UK on January 2009 and was in UK till March 2010.

Then because of Pankina judgement, I was granted visa (Tier-1 General) in February 2012 for the application I made in September 2008. With this Tier-1 General visa I came to UK again April 2012. Now my next extension is due by February 2015.

My question is when am I eligible for ILR? Will my previous stay in UK will be accounted for in ILR calculation? since I had to go back in September 2008 because of visa rejection at least the previous period from November 2006 to September 2008 will be considered for ILR calculation? Please clarify.

Many thanks in advance.