Ok,lets recapitulate: Tell me yes or no to each one:

1)You downloaded this: http://www.xinputer.com/download/Mot...060001_x86.zip

2)You installed it;

3)You plugged the ps3 and then windows did the usual sounds of something being connected;
(STEPS 3 and 4 can be done in any order)
4)You started motionjoy;

5)You clicked in home on motionjoy to see if it detected the ps3;

6)You clicked "driver manager"

7)You clicked "load driver"

8)After some time and some blue text, it said was successful.