Thank you Sandra, it worked beautifully when I just changed the dll version referenced by the application.

I need to target the framework version 2 with Teechart v4. I get an error I can't solve. I post the error message: 'Advertencia 5 La referencia principal "TeeChart, Version=4.1.2010.11303, Culture=neutral, PublicKeyToken=9c8126276c77bdb7, processorArchitecture=MSIL" no se pudo resolver porque tiene ...