There is no difference in the installer for Xeams Community and Enterprise Edition. It will run as if you have purchased the Enterprise Edition for the first 30 days. It will then get converted to Community Edition unless a license is purchased.
Solved,it is really DNS issue,I change my DNS from 8.8.8.8 to be 4.2.2.1,and it works now.
Google DNS seems always has problem,maybe too many people use it.
