XLSX charts don't open in Libreoffice Calc Version: 4.2.5.2 Build ID: 420m0(Build:2)

I work with many users who use excel as their main data tool, and now when I open xlsx in Libreoffice calc, the charts just disappear! how can the portability be so poor?
My version of excel is xlsx file 2010 microsoft office
My version of Libreoffice is Version: 4.2.5.2 Build ID: 420m0(Build:2)
Any suggestions please on how to get around this? I really need to be able to view the charts in Libre office.
Thanks very much,
K