Accessing a MC from within a loop

I have a series of movie clips that I want to access from within a loop, to assign unique text to each. Within each MC there is a dynamic text field called titleText, which I want to assign text to. The MCs are named, demo1, demo2, and demo3 respectively. I have an array called pressArray which holds three data types that I created, of which has a function called getTitle that returns a string. The commented line within the loop works if I uncomment it, the second line is what I'm trying to do, which does not work.

Hopefully that all makes sense. Any help is appreciated.