JTT the DT/Forum search has not got recent entries indexed. However when you know something that's likely to be in the title of the threads you're looking for you can use the Filter box to search. Typing CD into the Filter box and setting the Age drop-down to 3 years and pressing Refresh will do this (finding both of those quoted by Masato). (TECH is another you might try).

(You can use the Forum Search in the drop-down that usually shows Quick Links, but that returns a longer list of messages rather than threads I think).

When you know you've contributed to a thread you're looking for (as you did in the TECH: How long do CDRs last? thread), you can click on your name in the From line of any message you've posted (for example the first one in this thread) and get a list of all the messages you've posted and go from there.

Hope this helps

Mick