I want to host an umbraco website inside another ASP.Net Website.SO I made a sub-site under my website in IIS so that I can create a URL structure like this

myOlddomain.com/newUmbracositename

Everything looked ok to me.But when I run the subsite it throws an error like this

        [HttpException (0x80004005): Could not load type 'PaymentsModule'.]
       System.Web.Compilation.BuildManager.GetType(String typeName, 
Boolean throwOnError, Boolean ignoreCase) +12535893
       System.Web.Configuration.ConfigUtil.GetType(String typeName, String 
propertyName, ConfigurationElement configElement, XmlNode node, 
Boolean checkAptcaBit, Boolean ignoreCase) +76

Does anyone have any Idea what I am doing wrong here?