Real Time Windows Target- Clock Freeze

I am running MATLAB 2013b on a Windows 8.1 64 bit machine, and am having an issue using Real Time Windows Target. When I run the examples, the clock gets hung up at 0:00. However, if I reinstall the kernel each time before I run the model, it works about 60% of the time, and still gets hung up for the other 40% of the time. I saw a thread that suggested using the platform clock setting, but it also says that this setting should be changed for debugging purposes only. I've also seen a lot of discussion regarding this same error across the web, without any good solutions. I just wanted to check and see if anyone had found something that resolves this. Thanks.