First off, I dont see anywhere in your code sample where your incrementing the variable "count" besides the on press event. Second, using setProperty is a flash 4 method and can be addressed with dot notation.....
setProperty(this, _y, 32.1);
in dot notation would look like....
What is the original value of your count variable and how are you incrementing it? In the code sample you posted, variable "count" is only increased on a press event. A nested if statement is one that resides inside of another if statement. The code sample you posted uses seperate if statements inside the on press event handler. Maybe a more precise description of what your trying to achieve would help.
A mind once stretched by a new idea never regains its original dimensions.
- Oliver Wendell Holmes