I have used this RegEx in the GUI version of BRU but I am having issues getting it to work via command-line. Clearly, I must be doing something wrong with my syntax. Any help would be much appreciated

BRC64.exe /DIR:"C:\Users\Shawn\Desktop\Combine PDF\Process" /NOFOLDERS /REGEXP:(.*TITLE 2.*):01 - \1 /EXECUTE
Just a brief description of what I am trying to do. I am just looking for a keyword in the file name and if it finds a match it adds 01 - to the front.
Thanks.