Ubuntu 64 bit and Win7 64 EFI does not work together

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http://askubuntu.com – I'm desperately trying to install Ubuntu on my Win7 machine, without success. I tried to: - install a boot partition on Ubuntu on C:\, where Windows lives, and "/" (root) in my other hard drive, which is big and nice. - the boot partition is primary and EXT2. Is mounted as "/boot" After installation, I tried using EasyBCD to make an entry for Ubuntu, but when launched, it just shows a grub prompt. No idea what to do there. Any help? (HowTos)