DoSearch ERROR: eBay.Service.Core.Sdk.ApiException: There is an error in XML document (767, 49). ---> System.InvalidOperationException: There is an error in XML document (767, 49). ---> System.InvalidOperationException: Instance validation error: 'Days_28' is not a valid value for ListingDurationCodeType. at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReadereBayAPIInterfaceService2.Read71_ListingDurationCodeType(String s) at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReadereBayAPIInterfaceService2.Read110_ItemType(Boolean isNullable, Boolean checkType) at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReadereBayAPIInterfaceService2.Read407_SearchResultItemType(Boolean isNullable, Boolean checkType) at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReadereBayAPIInterfaceService2.Read410_GetSearchResultsResponseType(Boolean isNullable, Boolean checkType) at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReadereBayAPIInterfaceService2.Read786_GetSearchResultsResponse() at Microsoft.Xml.Serialization.GeneratedAssembly.ArrayOfObjectSerializer366.Deserialize(XmlSerializationReader reader) at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events) --- End of inner exception stack trace --- at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events) at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle) at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at eBay.Service.Core.Soap.eBayAPIInterfaceService.GetSearchResults(GetSearchResultsRequestType GetSearchResultsRequest) --- End of inner exception stack trace --- at eBay.Service.Core.Sdk.ApiCall.SendRequest() at eBay.Service.Core.Sdk.ApiCall.Execute() at eBay.Service.Call.GetSearchResultsCall.GetSearchResults(String Query) at ebaystatic.MyEbay.DoSearch(String eBayKeyword, Int32 MaxResults, Boolean CheckForAlternateKeyword)