Unable to Smush image more than 1MB Limit

Hi,

I’m currently using Smush.it on my website http://sg.propertylaunchnetwork.com to reduce the image size & increase web load time. However, I saw this error message when I’m processing the iumage using Smush.it

– 1360×667: Smush.it error: Image size exceed 1MB limit while processing http://sg.propertylaunchnetwork.com/wp-content/uploads/2013/02/DNest-OneMap.png (/home7/rssprope/public_html/sg/wp-content/uploads/2013/02/DNest-OneMap.png)

How do I resolve this issue? Thanks.

http://wordpress.org/extend/plugins/wp-smushit/