Getting Error in Web Services
<p>I am getting following response of while using web services</p>

<pre><code> &lt;s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"&gt;&lt;s:Body&gt;&lt;s:Fault&gt;&lt;faultcode 
xmlns:a="http://schemas.microsoft.com/net/2005/12/windowscommunicationfoundation/dispatcher"
&gt;a:InternalServiceFault&lt;/faultcode&gt;&lt;faultstring xml:lang="en-US"&gt;Object reference not set to 
an instance of an object.&lt;/faultstring&gt;&lt;detail&gt;&lt;ExceptionDetail 
xmlns="http://schemas.datacontract.org/2004/07/System.ServiceModel" 
xmlns:i="http://www.w3.org/2001/XMLSchema-instance"&gt;&lt;HelpLink i:nil="true"/&gt;&lt;InnerException 
i:nil="true"/&gt;&lt;Message&gt;Object reference not set to an instance of an object.&lt;/Message&gt;
&lt;StackTrace&gt;   at BAL.getDUCID(String DUC, String Plateform) in 
f:\DotnetSite\Websites\APSWServices\App_Code\BAL.cs:line 28&amp;#xD;
</code></pre>

<p>at <code>IPhone.getHeaderAds(String Duc, String PId, String W, String H, String AdsId, String SessionId, String IMEI, String User_Agent)</code> in <code>f:\DotnetSite\Websites\APSWServices\App_Code\IPhone.cs:line 67&amp;#xD;</code></p>
