Hacking Problem with running homebrew

[Gimmy]

I'm using nintendo DS lite, with M3 SD (v29) and a passcard (it looks like that )http://www.ndscene.net/images/articles/passcard1.JPG.
every time I'm trying to run a homebrew, it shows a loading red bar and just freeze. I'm using *.ds.gba files (for my matter) but still does't work.
do I have to transfer them to my SD through the GameManager? or do I need to change their extensions?

*I can run NDS\GBA games.
*I read the guides but they kinda out of date I think.

(edit:fixed the link to the picture)

 

[jeklnoo]

suggestions, try these (possibly in combinations)

1. try renaming to .ds.nds
2. try starting with A button or START button (they do different things)
3. try using .nds instead of .ds.gba

 

[Gimmy]

I see U guys don't use M3...