Surely you don't mean you're trying to stand on the ground and affix your stand to the tree? Not sure from your post...
There's some good info in a couple older threads I dug up for you:
http://www.huntingnet.com/forum/tm.aspx?m=2472322&mpage=1
http://www.huntingnet.com/forum/tm.aspx?m=2381468&mpage=1