I"m sorry. i didn't explain myself. the device is rooted, and the superuser lib does recognize it as rooted. but the commands dosen't run. it gives error m- "permission denid", all though i think that in the menifest i gave all the permission needed.
however, since the superuser lib is old, i think i will not find a way to work it up. so, what i try to understand is how to build a superuser app from B4A. since the java exmple they send me does work. i wonder if it is possible from the app design, or it should be in the installation process only.