Finally i could get cracking with appinventor and eclipse for developing apps with my ft3. The problems was that i used to get the following errors

/system/bin/sh:am not found


/system/bin/shm not found

these errors seem to be caused by busy box

Luckily ive stumble upon a simple fix.

do the following

open root explorer
mount r/w
then goto /system/bin
long press pm and scroll the menu down to edit in text editor
make sure #!/system/bin/sh is the top line if not add it and save it
same with /system/bin/am
reboot the ft3

you might have to give permission for writing to the file... this can be done by

goto root explorer
long pressing the file
choose permissions
tick all the fields

hope this is useful... for its unlocked the true potential of the pad

Cheers and keep developing