scrollspeed script problem

[jonsilva]

hello
I have a level scrollspeed set to 0.3 it needs to move really slow...
iam trying to stop the screen once a certain event accours
the problem is  "changelevelproperty("scrollspeed", 0.3);" doesn't take decimals

changelevelproperty(name, propertyvalue)
~Change a property value of current level, this function is not quite completed.
~name can be:
~"rock", the given value must be an interger value or numeric value that can be converted to integer value. The rule is same as rock command in level file, check the manual for details.

is there another way to stop the screen then go back to the previous speed 0.3 ?