Help on Retrieving Pictures

Recently, I just bought Canon G9. Lovely camera, but I accidentally format my Panasonic 4Gig SDHC, erasing all the pictures on it.
I use the same card and made pictures again without realizing what I have done.
Then the card became full and I copied all the pics from the card onto my hard drive (and deleted them) and realize that I format the pictures (in the first place).
I tried several programs to get data back, but I can only retrieve the pictures that was deleted but not the pictures that was erased by formatting the card the first time.

Can anyone please help me???? I really would like to get back the pictures that has been erased by formatting the card.
I have tried Handy Recovery by SoftLogica and GetDataBack from Runtime Software.

Since you wrote over the files and filled the card up, you probably won't be able to get the files back.

As you said, you got the most recent ones back, but the ones that were written over are pretty much gone.