I've set up a shopping feed with Google merchant center, and I keep getting error messages from Google as follows...

"The submitted image URLs seem to be blocked by robots.txt. Google will not be able to display these images together with the products. Please change your robots.txt file to allow Google to download the image."

Here's an example of a couple images that it lists as not being able to access..

http://divelightsdirect.com/images/c...om-375x375.png
http://divelightsdirect.com/images/c...uperq700sq.png

My robots.txt files is as follows...

User-agent: Googlebot
Disallow: /*?

User-agent: *
Disallow:

I've tried to adjust my robots.text file to allow just about everything except the "?" urls which I do to prevent Google from indexing duplicate content.

My robots.txt is located at http://divelightsdirect.com/robots.txt

Any advice would be appreciated.