Default [Q] i9000 cant stay download mode,,,need help

hi,i have i9000 in my hand with a problem of not stay in download mode and go to recovery after put in download mode just after 5 seconds,
history is someone flashed it with anycall rom and afterthat it stuck at logo everytime and when i wipe it cache and factory then it is power up normally but just for one time,

now i cant flashed it bcoz it cant stay in download mode and immediately go to recovery,
in recovery also shows the
E:internal mmc pen fail
E:lfs pass open fail



how to fix it and back to original i9000 stock rom?