Dm7020Hdv2-Cant Boot up

Hi everyone, I had a Dm7020Hd v2. I try to install CCcam & dFlash & also mistakenly an old PLi image, ‘pli-jade-dm500-20080718-5335’. When i reboot, it just hangs there for a very long time. So again I turn-off the Dreambox and turn-on again, sadly to say it can’t boot-up anymore, the display show the following,

“ dreambox

Powered by DREAM multimedia

(Dreambox IP address)

** SERIAL MODE **  “

I try again to install the latest image by ‘http://www.dream-multimedia-tv.de’, it didn’t work anymore. I had attached a boot log. I know nothing about this dreambox technology, could someone help me please!

Thanks very much!