Stuck on an ASP.NET/WCF WSDL Parsing Error - asp.net

Question

I have a WCF Web Service that my ASP.NET app uses. It has been working fine for quite some time.
I just added in a Dev Express Grid (and the Dev Express DLLs) and a new page that uses them and now I am getting parsing errors on the WSDL.
But the weird part is that it works fine on my machine but fails on the web server machine. (Both are connecting to the same web services WSDL.)
Here is the error message I am getting:
Server Error in '/MyWebAppWebDev' Application.
--------------------------------------------------------------------------------
Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.
Parser Error Message: Reference.svcmap: Failed to generate code for the service reference 'MyWebAppService'.
Cannot import wsdl:portType
Detail: An exception was thrown while running a WSDL import extension: System.ServiceModel.Description.DataContractSerializerMessageContractImporter
Error: Referenced type 'WebClientApp.MyWebAppService.ReferenceUpdatesDataContract, WebClientApp, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' with data contract name 'ReferenceUpdatesDataContract' in namespace 'http://schemas.datacontract.org/2004/07/MyWebAppServiceLibrary.DataContracts' cannot be used since it does not match imported DataContract. Need to exclude this type from referenced types.
XPath to Error Source: //wsdl:definitions[#targetNamespace='http://tempuri.org/']/wsdl:portType[#name='IMyWebAppReferenceDataServiceLib']
Cannot import wsdl:binding
Detail: There was an error importing a wsdl:portType that the wsdl:binding is dependent on.
XPath to wsdl:portType: //wsdl:definitions[#targetNamespace='http://tempuri.org/']/wsdl:portType[#name='IMyWebAppReferenceDataServiceLib']
XPath to Error Source: //wsdl:definitions[#targetNamespace='http://tempuri.org/']/wsdl:binding[#name='MyWebAppServicesDefaultEndpoint']
Cannot import wsdl:port
Detail: There was an error importing a wsdl:binding that the wsdl:port is dependent on.
XPath to wsdl:binding: //wsdl:definitions[#targetNamespace='http://tempuri.org/']/wsdl:binding[#name='MyWebAppServicesDefaultEndpoint']
XPath to Error Source: //wsdl:definitions[#targetNamespace='http://tempuri.org/']/wsdl:service[#name='MyWebAppReferenceDataServiceLib']/wsdl:port[#name='MyWebAppServicesDefaultEndpoint']
Source Error:
[No relevant source lines]
Source File: /MyWebAppWebDev/App_WebReferences/MyWebAppService/ Line: 1
I am completely stumped on this. I have checked my web.config endpoint address and it is spot on (and notably is not in the error message above).
Any ideas would be welcomed.
Things I have tried:
Giving permissions to C:\Windows\temp to my Website user name
Giving permissions to C:\Windows\temp to my App pool user name
Checking to see that none of my data contracts are generic and have IsReference=true in them.

Answer 1

Are you running Skype? Seems like something is already using up a port for that web site, try browsing the site in a web browser to confirm.