Can't install any rom ***help help*** topic

Please help me... I cant install any custome rom... I have unlocked bootloader... I put original 2.1 root cwm and I flash nAa but every time i tap rebot system now.. Turn off-->nAa LOGO-->Recovery... Everytime... Then I put again on stock version... And I put nfls kernel and again... Any room I put he just restarting... I do full wipe everytime... PLEASE HELP... And yes I relock bootloader and again unlock... And nothing (((! Please help.

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