Illustrator :: Black Boundary Lines When Placing Image

I am making a business card in Illustrator 6.
 
I placed an image of my black signature with transparent background on the white background business card, and now it is leaving a box were that signature image canvas ends. This happens with both a .psd and .pnd files.
 
Now if I could just go into photoshop and extend the canvas and leave the image the same size that would be great. When I try to do this though there is still the old canvas boundary line.
 
If I was able to start all over I would have had the original canvas size way wider than the image of my signature that I drew on it. That way it's boundaries would now be outside of my business cards boundries and I would not be seeing those black boundary lines.