When i put in my xbox 360 hdd into the xbox 360 it wont start help

[narutobolt]

when i put in the xbox 360 HDD into the xbox 360 it will turn on and show you the thing that always shows when you turn on the xbox but it won't open it all you will see is the big logo of xbox, the big green x on a ball, but if i start it without the HDD it start normally............... psz help

 

[r_manic]

There are only specific kinds of HDs compatible with the Xbox 360... which one did you install?