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Have you tried doing a manual reboot of the application pool where the site is sitting in IIS? Documentation might not be exact for the version but it should explain it well enough to give you an idea about what’s going:
https://technet.microsoft.com/en-us/library/cc753179(v=ws.10).aspx
Basically, if you have the application pool recycle every 3 hours, when you make a change it could take up to 3 hours for the change to take effect. You also don’t want it recycling every 5 minutes either. But you can do a manual recycle if you really want to see your changes.
Source:stackexchange.com