Feb 29, 2012 11:46 pm Hmm, been awhile since I used fruity, so my memory may be sketchy.
As I remember, as long as the midi device in the settings/preferences is set to your controller, it should be good to go. Whatever VST/i you have opened in your channels list, make sure the midi-channel (1-16) and your midi controller's channel match.
Also, is the channel/track in the mixer armed? If memory serves, it should play back whether it is armed or not, but only records if it is armed.
Another thing you can do with fruity is open a template (like the minimal templates or whatever) that just has a single channel loaded. So then you can go and load in a vsti instrument/softsynth and avoid having stuff loaded up that you don't really need.
Also, if memory serves, like any DAW, FL Studio needs exclusive use of the audio streams, so make sure no mp3 players or anything like that are open outside of fruity. (it usually displays a warning message when you open the program though, so it's pretty obvious)
Anyway, chances are it is something simple like a midi routing issue.