No alert popups when WinNUT is run as a service (Windows 7)

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What steps will reproduce the problem?
1. In Win7, use WinNUT configuration tool to run as a service (automatic or 
manual).
2. Apply and start WinNUT.
3. On the server with the UPS, stop and/or start the NUT daemon.
4. No alert popup messages are seen on the Win7 system.

What is the expected output? What do you see instead?
In Win7, the standard installation location was selected.  WinNUT run as an 
application works as expected and alert popups are seen.

What version of the product are you using? On what operating system?
Used WinNUT-2.0.0.4a-Installer.exe for Windows 7 (with all the latest updates).

Please provide any additional information below.
Disabled firewall (Windows 7 Firewall Control) and virus (Microsoft Security 
Essentials) programs in case they were causing any issues/conflicts but the 
behavior was the same.

Original issue reported on code.google.com by [email protected] on 17 Mar 2011 at 2:31