I have been working with a third party COM component for a couple years
now, and have been integrating our .NET website,

We recently upgraded the version of the third party application, and
now when I run my code, I get:

QueryInterface for interface MEAOAM._AddressMap failed.

A couple of interesting points:
1) Works on my dev box, Win2000.  Does not work on Windows 2003 Server.

2) I have upgraded the third party app (which the COM component comes
with).  The version and GUID of the COM component has remained
contstant.
3) The COM component is *not* in Component Services in either machine.

This has to do with a combo of the new version of the 3rd party app/com
component and the OS.

Any thoughts?

TIA,
Jason

The stack trace is below:
=======

All Details:

QueryInterface for interface MEAOAM._AddressMap failed.
Description: An unhandled exception occurred during the execution of
the current web request. Please review the stack trace for more
information about the error and where it originated in the code.

Exception Details: System.InvalidCastException: QueryInterface for
interface MEAOAM._AddressMap failed.

Source Error:

An unhandled exception was generated during the execution of the
current web request. Information regarding the origin and location of
the exception can be identified using the exception stack trace below.

Stack Trace:

[InvalidCastException: QueryInterface for interface MEAOAM._AddressMap
failed.]
MEAOAM.AddressMapClass.set_Account(String Account) +0
LaLonde.Framework.Mail.MailingList.DeleteMailingList(String postOffice,
String listName) +328
LaLonde.Components.MailingLists.RefreshUsersOnMailServer() +86
LaLonde.Components.MailingLists.RefreshUsersInMailServer(Portals
currentPortal) +194
LaLonde.Web.MailingLists._default.UpdateFilesButton_Click(Object
sender, EventArgs e) +17
System.Web.UI.WebControls.LinkButton.OnClick(EventArgs e) +108
System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String
eventArgument) +57
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler
sourceControl, String eventArgument) +18
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
+138
System.Web.UI.Page.ProcessRequestMain() +1277

Description: An unhandled exception occurred during the execution of
the current web request. Please review the stack trace for more
information about the error and where it originated in the code.

Exception Details: System.InvalidCastException: QueryInterface for
interface MEAOAM._AddressMap failed.

Source Error:

An unhandled exception was generated during the execution of the
current web request. Information regarding the origin and location of
the exception can be identified using the exception stack trace below.

Stack Trace:

[InvalidCastException: QueryInterface for interface MEAOAM._AddressMap
failed.]
MEAOAM.AddressMapClass.set_Account(String Account) +0
LaLonde.Framework.Mail.MailingList.DeleteMailingList(String postOffice,
String listName) +328
LaLonde.Components.MailingLists.RefreshUsersOnMailServer() +86
LaLonde.Components.MailingLists.RefreshUsersInMailServer(Portals
currentPortal) +194
LaLonde.Web.MailingLists._default.UpdateFilesButton_Click(Object
sender, EventArgs e) +17
System.Web.UI.WebControls.LinkButton.OnClick(EventArgs e) +108
System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String
eventArgument) +57
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler
sourceControl, String eventArgument) +18
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
+138
System.Web.UI.Page.ProcessRequestMain() +1277