Why do i get "Wrong API base URL used" when pinging Adobe EchoSign Cloud by a SOAP request?
<p>I am trying to access signed documents within the Adobe EchoSign Cloud. I have got an API key for authentication and used it in a <code>testPing</code> SOAP request like </p>

<pre><code>&lt;soapenv:Envelope 
    xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
    xmlns:api="http://api.echosign"&gt;
    &lt;soapenv:Header/&gt;
    &lt;soapenv:Body&gt;
        &lt;api:testPing&gt;
            &lt;api:apiKey&gt;myKeyhere&lt;/api:apiKey&gt;
        &lt;/api:testPing&gt;
    &lt;/soapenv:Body&gt;
&lt;/soapenv:Envelope&gt;
</code></pre>

<p>I sent this request to </p>

<pre><code>https://secure.echosign.com/services/EchoSignDocumentService22
</code></pre>

<p>But as a result I only get</p>

<pre><code>&lt;soap:Envelope 
    xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"&gt;
    &lt;soap:Body&gt;
        &lt;soap:Fault&gt;
            &lt;faultcode&gt;soap:Server&lt;/faultcode&gt;
            &lt;faultstring&gt;Wrong API base URL used&lt;/faultstring&gt;
        &lt;/soap:Fault&gt;
    &lt;/soap:Body&gt;
&lt;/soap:Envelope&gt;
</code></pre>

<p>What does that message mean?</p>