Ooopss... Sorry, it was just a syntax error, sorry for bothering you for such mistake. Well, now the cloak works fine, thank you for help!
Well, I have a small mod underway and cloaking ability is quite important for it.
EDIT: One additional "problem" arouse. It's only cosmetic, nothing important, but when I hover mouse over the unit in order to see the info panel (hp:s, armour etc.) there is a new row "???Cloak???". Can I somehow remove these question marks, so it would display "Cloak"?
ps. Sorry for my bad English.