INsufficient permissions for setting the configuration property 'port'

I'm getting the following error when trying to send e-mail from my asp.net vb codebehind;

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.

Parser Error Message: Insufficient permissions for setting the configuration property 'port'.

Source Error:

Code:

Line 79:     <mailSettings>

Line 80:       <smtp deliveryMethod="Network" from="myweb System Generated&lt;[email protected]&gt;">

Line 81:         <network host="mail.myweb.com" userName="[email protected]" password="********" port="587" />

Line 83:       </smtp>
 

Suggestions?

 

For PawtucDave and other user's experiencing this error, try increasing the Trust level that your application runs under to Full.