I have one of our website having error when saving page properties it will display a dialog box but will not save the changes I made hope that someone can share some inputs regarding this.

I already upgraded the Concrete 5 version from 4.2 which initially has the error and after successfully upgrading to 5.5 it still shows that error

screenshot of the dialog that's coming up after saving the page properties (both from front end and dashboard in sitemap)

http://screencast.com/t/rYjkR0vsNp...

Hope someone can help me with this. TIA