Problem with text box

I have an mc, Linkage name: <bat>, consists of a dynamic text box, var name <mon>, registration point some 100 pixels from center. On kf 1 of main timeline:

message = “Kirupa”;
str = new String();
q = 1;
spl = message.slice(q-1,q);
str[q] = spl;
j = 1 ;
attachMovie ( “dat”, “dat” + j, j );
_root[“dat” + j ]._x = 300;
_root[“dat” + j ],_y = 200;
_root[“dat” + j ].mon = str[j];//up to here, everything in order
//“K” shows at indicated coordinates, but now:
_root[“dat” + j]._rotation = ndegrees; //and the text disappears! ! !
I have tried all ways of creating the text box (actually, there is only one way) but to no use.
Note.- I intend to make a loop to include all the letters of the message.
Many thanks in advance to anyone who is kind enough to look into what for me is nothing less than a mystery.