data announcement/presentation dates

Hi, I'm quite new to CXS.

Could someone please clarify the exact date of the next expected data publication ?

I have seen one report saying it's 1st June and another talking about dates of 5/6/7.

Also, am I right in assuming that the data to be presented if positive will have major significance for ChemGenex ?

I mean have they already announced that the data is good enough or have they offered little indication ?

Also, any punts on what effect positive news may have on the short term SP ? (I mean is this stock already considered to be undervalued?), if yes then by a lot or a little only?

I am not a holder but will 100% be as of tomorrow, just got to choose my timing to get in. I like what I've read about this company and it's prospects.