Installed XP Over Vista, got a dual boot screen but XP does not load now !!

I already had Vista pre installed on the laptop and now was trying to install windows XP professional on it on a different partition. Now i am encountering issues as i am not able to boot into windows XP although it shows up in the dual boot screen.

1. I already had a installation of Windows XP Pro on a DVD. I used nlite to create an ISO file with Windows XP SP3 slipstreamed it in and burned a bootable CD out of it

2. I used this bootable CD to install windows XP on a 6 GB partition available on the HDD.

3. Now as expected i was only able boot into windows XP.

4. I installed EasyBCD in XP and registered a new OS as "Windows XP Professional" and set its boot drive as E: (thats where XP is installed).

5. Then clicked on WRITE MBR.

6. Restarted the laptop to get a dual boot screen as expected. Now here i am able to boot into Vista but cannot do the same into XP (was able to boot into XP before this WRITE MBR thing happened)

Here's a picture of what the screen shows like when i select windows XP on the boot screen.

*img89.imageshack.us/img89/7497/dsc02538cy1.th.jpg*img89.imageshack.us/images/thpix.gif


What is the problem and how to rectify it ?