ASP.Net, How to solve this error
<h2>`Server Error in '/' Application.</h2>

<p>Configuration Error 
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately. </p>

<p>Parser Error Message: It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level.  This error can be caused by a virtual directory not being configured as an application in IIS.</p>

<p>Source Error: </p>

<pre><code>Line 29:    &lt;/connectionStrings&gt;
Line 30:    &lt;system.web&gt;
**Line 31:      &lt;sessionState timeout="20"&gt;&lt;/sessionState&gt;**
Line 32:        &lt;globalization requestEncoding="utf-8" responseEncoding="utf-8" culture="en-GB" uiCulture="en-GB"/&gt;
Line 33:        &lt;!-- 
</code></pre>

<p>Source File: D:\SILINDIA\WEBSITE\web.config    Line: 31 </p>
