Problem with core !!! OMG - what could be the problem and how do i rectify

Actually i did'nt mod the core at all just opened it and repacked to see the contents - nothing added nor deleted

so wat could have possibly gone wrong

+1 for your reply anyway

No, it is the repartition that is the problem. Not a problem, just that it is incomplete. And Not any from your side, but from binh24.
As soon as your flashing completes, check the log. I don't know about phoenix, but if you see JAF, the last word is 'Done!', above which you can see the details of the core and rofs2, alongside a 'None'.
The none means there is no author/version given. Its like *#0000#, which ain't given and hence the phone doesn't reboot.
Above all else, Its normal.

Don't worry about it.