Unable to lock folder

Hi all.
I recently installed and purchased Espionage (2.8.13), and I am running into a problem w/ one of my folders. After unlocking it, it won't lock again. What's weirder is that the first time this happened, the folder itself disappeared from the Finder. It still showed up within the Espionage app window, and I was able to see the folder contents through the "reveal in finder" option there. Upon doing so my folder, named "FCP Projects" showed up as ".FCP Projects". Sensing something was wrong, I copied all the contents out of that folder into a new one in the same place, which I also named "FCP Projects" However, now when I try to lock this new folder, it won't lock. No error message, no nothing. I'm not encrypting it, I just wanted to password protect that folder.
Any thoughts as to why this would happen? My other locked folders (both encrypted and non encrypted) are working fine.
I'm running OSX 10.6.8, for what it's worth.
thanks!
I recently installed and purchased Espionage (2.8.13), and I am running into a problem w/ one of my folders. After unlocking it, it won't lock again. What's weirder is that the first time this happened, the folder itself disappeared from the Finder. It still showed up within the Espionage app window, and I was able to see the folder contents through the "reveal in finder" option there. Upon doing so my folder, named "FCP Projects" showed up as ".FCP Projects". Sensing something was wrong, I copied all the contents out of that folder into a new one in the same place, which I also named "FCP Projects" However, now when I try to lock this new folder, it won't lock. No error message, no nothing. I'm not encrypting it, I just wanted to password protect that folder.
Any thoughts as to why this would happen? My other locked folders (both encrypted and non encrypted) are working fine.
I'm running OSX 10.6.8, for what it's worth.
thanks!