Node lock license won't stick

I have a node lock license for Power Civil v8i 08.11.06.39. I have successfully used it to activate my product. However at times when I run the software it will not recognize the license and I have to run through the activation process again to get it to activate. Sometimes I cannot get it to activate. I don't understand what is causing this. I am working on my home machine which is isolated from the license server so I can't  connect to it.

Here is a screen recording showing my activation workflow: 

http://screencast.com/t/MDc2OTU2MDEt

I have had this problem in the past when we were using a hosted server as well.

Can anyone identify the problem?