Q: Why the exception of no license is thrown in SP2 version, while in SP1 version there is no such case.

The problem is caused for the difference of the License Configuration Tool version. If the operation system are is Win7 (32bit or 64bit),Vista (4bit),Windows server 2008 (32bit or 64bit) or Windows server 2003 (64bit), the problem is liked to occur. The resolution is to download the newest version of License Configuration Tool and reconfigure it.