Printwarning imageresolution under 96 DPI

In Corel Draw Graphics Suite X4 I get a warning in the printing-window that the resolution of the image on the page is under 96 DPI. However, this is not right. It's a photopgraph in jpg-format (made by myself) and properties-window within the document tells the resolution is 291x291 DPI.

Other properties about the picture: the colourmode is 24 bits RGB, size is 1600x1200 (but I made it smaller to fit a part of the document).

What's happening here? I can't find anything in the program to correct this. And does it influence the quality of the print? I'm not very satisfied with the result, to be honest.

Thanks for a response, an answer or a solution. ellnath.