Username problem

I have a problem with the username.
in frame 2 i did this:
smilietext3=""
this.text1.text = Nick + “:” +smilietext1;
this.text4.text = Nick + “:” +smilietext4;
this.text3.text = Nick + “:” +smilietext3;
stop()
in frame 3 I did this:
smilietext4=""
this.text2.text = Nick + “:” +smilietext2;
this.text1.text = Nick + “:” +smilietext1;
this.text4.text = Nick + “:” +smilietext4;
stop()

and so on.
smilietext4,3,2,1 is the input text.
text1,2,3,4 is the dynamic text.
when i press the button i move to the next frame. there is a text that shows the username and the message.
the problem is that it types the username twice sometimes, and i can’t find the problem.

plz help.