SCCM 2012 WDS cant be installed

WDS cant be installed  Failed ServerManagerCMD.exe -i WDS -a~

As suggested, the SCCM should install WDS when you check "Enabled PXE support" on PXE tab of Distribution Point Properties and you should not need to install WDS yourself.
In my case, it does not work on my windows server 2012. So here is the solution to fix it.
1. Uncheck "Enabled PXE support" on PXE tab of Distribution Point Properties.
2. Install WDS through Server Manager.
3. Start WDS and configure it to create C:\remoteInstall folder, and start the WDS after configuration.
3. Go back to SCCM console and "Enabled PXE support" on PXE tab of Distribution Point Properties again.
It works in my case.

And also After a lot test, it turns out most likely it is because my Windows 2012 is standard verison, after installed SCCM 2012 on Windows 08 Enterprise, no such error happens again.