Hi there, very good to you all, i jus paused while building the Froyo 2.2 version in my Virtual Box, because it cause some compilation error. I knew from some forums, Froyo 2.2 requires 64 bit build environment. Here i could listed the sufficient data about my environment setups. OS: Fedora Core 12 build environment(PC): 32 bit architecture Android Version: Froyo 2.2 Apologies for my english