I mean its weird.... when i used this setup:

keymap:
hotkey: ctrl + mouse4
output: "4"

and put cainlightning on "4" in wow, all the toons in the in-active windows would start casting, but not my main.

and when i used the following, nothing at all happened:

keymap:
hotkey: ctrl + mouse4
output: ctrl + "4"

and this macro:
cast [mod] chainlightning; lightningbold

is any other german-client user here, who has the same issues?