Process Plugins that work with Vista

[Durando]

I am having a problem with the process addons I have attempted to use I am not sure if it is because of Vista or not but there is no logical reason that the code shouldn't work.

The ones i've tried so far are
Processes.dll
FindProcDLL.dll
KillProcDLL
nsProcess.dll

All I want is for NSIS to detect if blah.exe is running and if it is to tell the user to exit the program and retry or cancel the installation for a later time.

Every attempt I have made with the Forementioned Plugins has allowed me to continue installation without a warning despite the fact that the process i'm trying to detect is running.

I am running Windows Vista Ultimate 32bit, I can only assume it is a compatability issue with Vista because I have not been able to try on other versions of Windows.