Difficulty Changing Secure Logon Text Prompt

All this was done on Windows 7 Ultimate x64. I've been trying to get the "Press CTRL + ALT + DELETE or use the Windows Security button to <log on/unlock this computer.>" text changed. I made a copy of the authui.dll.mui files from both System32/en-US/ and SysWOW64/en-US/ to another location. I opened them up in Resource Hacker , went to String Table/753/1033 and changed the text for items 12035 and 12036 , hit Compile Script , and then save. I then made backups of the originals, took file ownership so that I could delete them, and, finally, replaced them. To verify that this operation was successful, I opened the files, now in their respective en-US folders, back up in Resource Hacker . Each text field displays precisely what I set it to. However, when I lock the computer or log off, the text has not been changed at all. Even after a reboot, the text has not been changed. Afterwards, I went back into the en-US folders to make sure they didn't revert and found my changes in place.