Download this file
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Open odin and select this file under pda, nothing else, no pit.
Put phone in Download mode ( power off completely, hold down 1 on the keyboard and power phone on.)
Connect your phone to PC, a box should turn yellow in Odin and list a Com Port. Push Start. That's all.......
Edit: If that doesn't work, try the Odin Version included in THIS Stock Froyo DK17 zip
http://www.multiupload.com/CTSZYR63CP