I Cannot boot windows 8 after installing windows xp

hello guys ( sorry if i cant speak English very well)

last night i installed windows xp , but after installing it , i cannot boot the windows 8 , when i restart the computer , it automatically goes to xp , and i installed the xp on a different partition

i tried EasyBCD and i created windows 8 and xp on the entry and set windows 8 on default , and click on wait for user selection and saved it , but when i restart the computer , it does not work and automatically go to xp


what should i do ?

Try

From the Repair CD/USB:
How to do a Auto Repair:
http://www.eightforums.com/tutorials/2843-automatic-repair-run-windows-8-a.html
Note: You may need to do startup repair 3 to 4 times.
Startup Repair - Run 3 Separate Times - Windows 7 Help Forums

Best to install Win XP first.

when i try refresh your pc and automatic repair , it says : This option is not supported on the operating system you selected

Your other thread.
http://www.eightforums.com/installation-setup/28972-how-delete-windows-xp-without-safe-mode.html

theog said:

Your other thread.
http://www.eightforums.com/installation-setup/28972-how-delete-windows-xp-without-safe-mode.html

Click to expand...

you didn't answer this question on the other thread !
why would it say This option is not supported on the operating system you selected when i have windows 8 !