HAving issues with Alt+

[IMTrick]

Then why does my shift modifer key strokes work when I use them. I set all my mapped keys at the same time.

Shift works differently from alt. For example, Shift+2 = @, but Alt + 2 = Alt + 2.

The difference is that a control and alt sent one character plus a modifier key, and shift sends one character (but a different one than the unshifted character). ISBoxer doesn't need to know you're holding the shift key; it just needs that one character. There's no need with shifted characters to track the state of any other keys.