Could not use ''; file already in use
<p>Could not use ''; file already in use. 
this statement appear when trying to run my website</p>

<p>the statment that cause the error is</p>

<pre><code>&lt;asp:accessdatasource id="img" runat="server"
      datafile="~/app_data/user.mdf"
      selectcommand="SELECT des,imgid FROM Image" /&gt;
</code></pre>

<p>or this</p>

<p></p>

<pre><code>  &lt;selectparameters&gt;
     &lt;asp:querystringparameter querystringfield="id" /&gt;
  &lt;/selectparameters&gt;
</code></pre>

<p></p>

<p>can any one help me to know what cause the error
note:the file not opend by any other program</p>
