Perhaps you tried the "Lyrics Search", which only looks at the DT; the one to go for is the newer and much more powerful "Digitrad and Forum Search", through which I found it immediately.  (I remembered it from last time).  Another thing you can try (which can be a help, too, for recent threads that may not have been indexed yet) is to click on your name at the head of one of your own posts; this will get you a list of links to all the posts you have ever made here under that name.  Often quite a sobering experience!

Malcolm