xp wont boot vista

I have a problem when i turn on my computer i have a choice between microsoft windows(which is vista) and windows.old(which is xp) when i go to microsoft.old it comes up with a black screen and does nothing. When i type in BCDedit in the comand prompt in vista it comes up with
Windows Boot Manager -------------------- identifier {bootmgr} device partition=C: description Windows Boot Manager locale en-US inherit {globalsettings} default {current} displayorder {ntldr} {current} toolsdisplayorder {memdiag} timeout 30
Windows Legacy OS Loader ------------------------ identifier {ntldr} device partition=C: path \ntldr description Earlier version of Windows
Windows Boot Loader ------------------- identifier {current} device partition=C: path \Windows\system32\winload.exe description Microsoft Windows locale en-US inherit {bootloadersettings} osdevice partition=C: systemroot \Windows resumeobject {50c73d4d-e6b3-11da-bc73-d30cdb1ce216} nx OptIn
But what do i change and how do i do it. Can someone please help

Hello,
The problem here is that you installed Windows Vista OVER your previous Windows installation. This happened because you installed Windows Vista to the same partition that your previous version of Windows was installed to.
The previous installation of Windows is no longer bootable. It should not be listed on your boot menu it all.
- JB

What do i do then??

How do i fix it???

If by "fix it" you mean uninstall Windows Vista and go back to Windows XP, unfortunately the chances of successfully accomplishing this are not good. I suggest reading the following thread:
http://neosmart.net/forums/index.php?gettopic=38&p=1
This is the only information I am aware of that deals with uninstalling Windows Vista and going back to Windows XP after you have installed Windows Vista over Windows XP.
Always remember that installing an operating system to the same partition that another operating system is installed on is a non-reversable operation that renders the previous operating system unbootable, probably for good.
The correct way of installing two operating systems on the same computer is to install each operating system to its own partition.
Good luck.
- JB

Thanks for the help