I recently bought an NDSTT, and haven't been able to get it to work at all! I've followed all the advice from the website, installed the latest software on my PC, and the latest firmware on my micro SD, but to no avail. Every time I boot up my DS Lite with it inside it goes straight to that standard splash screen where you are given the choice between playing your slot 1 DS game, or slot 2 GBA game, or going to Settings. Nothing I choose here makes the card work though. Has anyone else had this kind of trouble and/or have any suggestions? I've never had this kind of trouble with any flash card I've tried in the past >.<
I'm no expert with the DS as I have just started playing around with it but from the sounds of it you might have a defective DSTT cart. Do other carts load ok in the slot 1? if not then your slot 1 might be damaged/dirty etc... if other carts do work then it would point to a possibly faulty dstt cart.
actually i just bought the ndstt too and had the same problem. it was pretty bad, but i found a way to make it work. just kinda push the card back when it's in the ds, then turn it on. if it still doesn't work push it forward. And just reapeat till it works. sometimes it takes 5 min but as long as it works i'm happy.