System.Web.Services.Protocols.SoapException: The request must contain the parameter Signature. 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 uk.co.elitedesigns.amazonWebService.AWSECommerceService.ItemSearch(ItemSearch ItemSearch1) in c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\e1cb4bbc\a408b9a1\App_WebReferences.cp6hn9ty.0.cs:line 180 at uk.co.elitedesigns.amazon._default.ShowListing(String searchString, String searchIndex, Int32 page) in c:\inetpub\wwwroot\Elite Designs Web\amazon\default.aspx.cs:line 89