Just upgraded from my 6700 with wm6.1 (flashed by me) to the 6900 with 6.0

.
not ready to flash it yet.
I am very concerned that I cannot get threaded messaging to work with any third party software (e.g. sms-chat, etc) as there are no sent text messages show up in my sent box (or out box) for that matter!
yes people are getting them but I have no idea where the data receipt of the sent is residing.
Anyone seen this before? obviously the 3rd party programs cannot do threaded messaging if they cannot see data in the sent folders of txt.