I have installed the Stock Quote web part on both our test and live SharePoints but am getting the following:

ERROR:Request for the permission of type 'System.Net.WebPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

I have switched the "Trust" level to "WSS-Medium" and still get the message.  Can someone help me with what I am missing?  We are hosting our own SharePoint.

Thanks in advance for any insight!

Tom Y