I am trying to add security to an existing application.  In one form, I've added code to the form's CheckSecurity event.  If I return a PermissionInfo object set to GRANT, everything works as expected.  If I set the PermissionInfo to DENY, along with a message, then the message is displayed correctly but the application just hangs/disappears after the MessageForm closes.  Nothing. Zip. The VS2008 debugger shows the application is still running, but the Gateway window is not re-displayed, as normal for my app.

The FormClosing and FormClosed events don't fire either.

Any ideas about where to look?

TIA