Buff Macro problems and Mousebinds in ISBoxer

[Matschdock]

Hi,
i started my group of DMMLP.
First i had big problems with "Interact target", randomly working or not working.
I switched from a mouse bind to a key bind, now it works perfect.

Also I tried to create a macro for buffing my team.
i have some difficulties:

/targetparty: doesn't select the player buffing

/castsequence: only allows one (@unit) and ignore other (@unit), i tried this for example and it doesn't work:
/castsequence [@Char01] arcane intellect, [@Char02] arcane intellect

/cast: different lines of /cast don't seem to work either

Do i miss some commands or am i wrong with the syntax?