Opening Adobe Illustrator File

Hello,

When I try to open an Adobe Illustrator File (.AI) I recieve a message from SolidWorks saying that I must have Adobe Illustrator installed on my computer (which I do CS5) in order to open .AI files.  Is there any way to troubleshoot this, I've looked elsewhere but I haven't seen this problem come up or mentioned.  Thanks for any help.

SolidworksImport export