Anyone use old 15pin joysticks?

[Chugster]

So i have just bought a Rockfire USB/15 pin adaptor to use with a Thrustmaster Top Gun joystick i bought a while ago. Now the joystick connects and i can see the axis, buttons and hat working on the Game Controller screen, albeit the axis movement is very restricted compare to modern sticks.

It seems to work fine with old dosbox games but when I try a slightly newer game it doesnt seem to work right, the axis worked fine in Jane's Fighter Anthology, but in others like Janes USAF and MS Combat Flight Sims 1/2/3 the axis didnt work properly and even did stuff like fire guns or missiles when you moved the stick.

So is this just a settings issue, either on the Rockfire adaptor or ingame or is it a fools errand to try and use these old flight sticks today?