Verifiying if a root process is open or running ...

Hi,

I have been trying to check if «Retrospect» application is active or runnig with these statements:

tell application "System Events" to exists process "Retrospect"

Tell application "Retrospect"
if (Retrospect status) is executing then

I was looking for the reason why those statements did not work. Retrospect is running under Root. How can I check these state for a Root application ?

Thanks in advance.