If you still see the license warning message in the result PDF file after applied the license, please check:

1. Whether your license code is called. Obviously if your license code is not called, it would be as if you are running the trial version. This often happens with an ASP.NET application. In that case please try to add the license code in Page_Load. The license code can be called multiple times without introducing much overhead;

2. Check the version of your EO.Pdf.dll and make sure your license key version matches your DLL version. For EO.Pdf 2013, the DLL should have major version number 5. For EO.Pdf 2014, it should have major version number 6. This often happens when you were trialing an older version of the product but we have already switched to a newer version when you purchase the license. In this case please download the latest version from our download page and update to that version.