fs 2004 setting up control buttons

just bought fs2004. Installed OK. then could not play any instructional videos. checked everything. then played game and at first was all OK. I bought cheap thrustmaster joystick, and seemed to work OK, but then the settings I chose seemed to revert or change. the axis worked OK but other control surfaces did not work. Then I found that some keyboard characters were different from those displayed after choosing them, example is shift+left arrow displayed as number 4. I checked that numbers lock was off. any idea whats wrong with 1) the video and 2) the control button allocation? thanks.