Adding a New Line When Editing PDF


We are trying to import a pdf into CorelDRAW X6 and edit the text on the pdf. That is all working fine. The text is importing as Artistic Text and is editable. However, if editing a line of text it will not allow line breaks. If you press 'Enter' to move to a new line it simply moves to the beginning of the current line and writes text on top of that line.  Is it not possible to start a new line of text? 

Thanks in Advance!