Audition 3 - Merging clips

Friends - I have an older version - Audition 3 (WIN10). I don't do a lot of editing now so CC is not needed but... in using this i find for some reason that the MERGE option is always greyed out. I actually had it work by chance this week but can't get it to work again after selecting the clips and then right click. It always wants to SPLIT which i've obviously already done.  ;-/    -  Your feedback on correcting this would be super helpful for this simple project I have. Everything else still works super great. THANKS, i need to get this working to speed up my project.