Q: Mac OS X cannot pass any 802.1X connection after install OS X server with Xcode

Hi there:

So today I update my Mac system to OS X 10.10, before I use OS X 10.9.4.

In OS X 10.9.4, I set up the Xcode service in the OS X Server, everything is fine, not user login required to reboot or shut down.

I am connected to the 802.1X Encrypted network, everything is fine.

So today, I update my system, with OS X Server 4 installed.

then I install Xcode 6.1, so far everything is fine.

I configure the initialization of the server, set up the web server, everything seems great.

However, I go to the Xcode page on the server, choose the Xcode 6.1, once I press open, there is a windows said wait for the Xcode to be configured.

up to 30 seconds later, my network was disconnected and cannot connected again.

Every time I choose the 802.1X encrypted network, it said it is authenticating, and wait for a long time it does not pass the authentication.

Previous, I choose the network, it connects using 5 seconds or less.

And if I want to shutdown, or reboot, I need to type in my user and password to go.

This is not exists in the previous version.

What I can do to reactivate the network, without reinstalling my system?