if you are modifying the variable through the following event example, you're doing it wrong
onActivate>Client>VCE_ModVariable [<var:cl:m>] [9001]
if you are modifying the variable through the following event example, you're doing it right
onActivate>Client>VCE_ModVariable [m] [9001]
the first example modifies the client variable "<var:cl:m>" and the second example modifies the client variable "m" which is what you want.