Slicer4.7 build error in Win7-64bit Vs2013

Hi all,
I tried to build Slicer 4.7 in debug mode with the VS 2013, and I got the following errors:
19>------ Rebuild All started: Project: EMSegment, Configuration: Debug x64 ------
19> Building Custom Rule D:/myProject/Slicer/CMakeLists.txt
19> CMake does not need to re-run because D:\S4D\CMakeFiles\generate.stamp is up-to-date.
19> Creating directories for ‘EMSegment’
19> Performing download step (SVN checkout) for ‘EMSegment’
19> svn: E155004: Run“svn cleanup”to remove locks (type ‘svn help cleanup’ for details)
19> svn: E155004: Working copy ‘D:\S4D\EMSegment’ locked.
19> svn: E155004: ‘D:\S4D\EMSegment’ is already locked.
19>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.CppCommon.targets(170,5): error MSB6006: “cmd.exe” exited with code 1.
By the way,my qt is qt4.8.7.
I don’t know where it went wrong,according to the compiler hints.

Can any body help me?
Any idea on how to proceed??

Waiting for your reply.
Thanks so much!