Cant change text field inside movie clip

[#1]

I have a movie clip symbol that I converted from a dynamic text field with the instance name "text2". When I try to add it as a child and then try to access the text field, the compiler throws:

Error #1009: Cannot access a property or method of a null object reference.

var test = new Qwe(); //Qwe is the movie clip converted from dynamic text field
addChild(test);

test.text2.text ="535";  /instance name of the text field was text2.

[#2]

I have a movie clip symbol that I converted from a dynamic text field with the instance name "text2". When I try to add it as a child and then try to access the text field, the compiler throws:

Error #1009: Cannot access a property or method of a null object reference.

var test = new Qwe(); //Qwe is the movie clip converted from dynamic text field
addChild(test);

test.text2.text ="535";  /instance name of the text field was text2.

[#3 · Accepted solution]

You don't have Advanced Layers enabled, do you?

[#4]

That's first time I ever even heard of it.  How do I check it?

[#5]

Ok, the culprit was it. I lost a whole day because of this.

Thank you for your help.