Compatability with Umbraco 4.7.2?

[Daniel Quick]

Hi

I am trying to run this on a large legacy installation of 4.7.2, and am getting an error:

FileNotFoundException Could not load file or assembly 'Umbraco.Core, Version=1.0.5443.21804, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified. at RB.RobotsHandler.Handlers.RobotsHandler.ProcessRequest(HttpContext context) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
http://www.xxxxx/robots.txt

Any ideas ?