help with sioc

Hi i'm looking for help with sioc.
I have done this with Realstudio but having problems doing it with sioc( maybe not possible?) don't know.
Var 1 and assign var 2 to var 1. Var 2 = var 1
What i want is to check if a potmeter goes up or down.
ex:
var 1, name Pressure , Link USB_analogic, Input 1 , posL 0, posC 127, PosR 255, device 0
var 2, name press_2
{
&press_2 = &pressure
If &press_2 < &pressure
{
then pressure goes up
}
else
{
then pressure goes dwn
}


}

but var 2 does not show any result making my code worthless. So would there be a other way to do that?
regards,
henri