Yep, Vladimir is right - do not write anything on this HDD! Or you will lose the last chance to recover your data...
I can advise one more program to look at: DiskInternals Uneraser (
http://recovery-review.com/undelete-...raser-2-9.html here you can read a review about it). Try this too (it has a trial) - maybe it can perform better than those two.