Trouble Printing Documents/bulk Packing Slips

I am having a problem since I upgraded CS Cart.
Now with the new version (with highlighting the line), I cannot get it to bulk print packing slips.
When I highlight my sales and click on “Print Documents-> Packing slip”, it pretty much seems to refresh the screen do nothing.
Has anyone else had this issue, know what causes it or how to fix it. I need to get back to printing bulk packing slips?