Concatenate String Values via line break in word reports

Hi, 

I have a small problem: I want to concate different string values from objects (in a loop) and after having the whole text, want to write it in a cell of a word report. Works fine,, but I only can concate the strings via " ", I would like to have a line break after each value, but it should be in the same cell. Tried \n, \r\n, <br> and Constants.FMT_ADDLINE, but I never got a line break. 

Could someone help me here? 

Thanks 

Jessica