Excel 2003 file with Visual Basic is crashing Excel 2013

I have 2003 Excel file with Visual Basics code in it. It works fine in versions up through Excel 2010, but it does not work in Excel 2013. Excel crashes whenever VB functionality is used. I have Add-ins Analysis ToolPak - VBA. Under Trust Center I have checked "Trust access to the VBA Project model". Macros are enabled when file is open. Excel 4 Macrosheets and Add-in Files are checked.

Of course I do not want to rewrite the program. Any suggestions?

Thanks for the help!