I have some docx file created under win7 use MS office which contains math equation typed by mathtype.

When I open these docx using Libreoffice writer under ubuntu linux, the math equation appears correct. But when I double click the math equation, I got “General OLE error”, I can’t edit the equation created by mathtype!!

What is wrong? What should I do to be able to edit the equation created by mathtype in Libreoffice writer under linux?