Why Can’t I Connect? 1.11.3 发布，此版本主要改进如下：
- Added a cancel button to the connecting progress dialog
- Moved the acquiring local address, binding, and acquiring server address functions to their own thread
- Added a progress / cancel dialog for this thread
- Added detection of system logout / shutdown signals to close the application, destroy temporary files, and flush the trace file.
“Why Can’t I Connect?” 是一个 TCP/IP 连接错误诊断工具。支持常用的网络协议诊断。