The utility I linked to allows you to uncheck or simply delete startup entries, so you should be able to make it quit loading, by doing as much.

But, since you said it works when you ran the program manually, then we need to look into this further to make sure it isn't a bug in the shell loading the startup items at the wrong time. Could you please respond and let us know what startup key the volume item was being ran from? Thanks.

The other possibility is that you ran it through an explorer window, and it depends on explorer. Could you test running it without any explorer items loaded? So via a hotkey or something? Thanks.