It was not at all clear to me that my files were being saved to the server during TWS build process.
The build output window just says:
------ Build started: Project: MyProject, Configuration: Debug x86 ------ ========== Build: 1 succeeded or up-to-date, 0 failed, 0 skipped ==========
Please include a lot more information about the build process, which files are detected as changed, their compile status and then their save to server status. A build summary would also be useful containing relevant information such as all files involved in the build.