Try downloading the ROM from here - make sure to check the DM5 sum of it (just below the download link), once on your computer. Then follow the same procedure as before... use the volume keys, perform wipes and then install zip from SD card.
Once all done, reboot system now and then you should be good to go![]()
Maybe, Can I also Install this rom? this was the reason I rooted my phone, to install this rom for my Desire Z. It is Ice cream sandwish for The Desire Z usig Cyanogenmod