"My teacher tipped me off about the MSL statement and he dosn't even know what it is cause someone told him about it and didnt tell him what it does."

And now he's perpetuating the bad habit!
Maybe you should get a new teacher? ;-)

It can be very dangerous to go blindly applying stuf which you have no idea what it does!

"Now im using Keil Microvision V1.24"

That's a very old version!
I've checked the current manuals, and there's no mention of "MSL"

Could you post an example of how you're using it?
(don't forget to use pre and /pre tags around your code, enclosing each tag within '<' and '>' angle brackets)