Why doesn't the CreateBackup=True generate a .xlk file?

Question

What is different in Excel 2010 that is preventing a backup from being created when saving a .xls as a .csv on a network share drive? 
If we generate the CSV from Excel 2003, the backups are created.  From Excel 2010, they are not.  It does not matter if the file was saved as a .xls version.  It also doesn't matter if the CSV is created using VBA code (where CreateBackup=True)
or you check the option when saving the CSV to "always create backups". 
Saving the .xls file with "always create backup checked" DOES generate a backup on the network. 
Saving the .xls file as a .csv with the option checked on the local drive also DOES generate a backup. 
Is there a setting or different VBA code we can use to allow the backup files to be created from saving a .CSV on the network using Excel 2010?
Thanks

Answer 1

Hi,
Please try to create a new workbook template to use as the basis for any NEW workbook first.
Click File>Save As> scroll down to Excel Template(*.XLT) and select
Click the Tools>  General Options > Check Always create backup
Store this workbook in the XLSTART folder usually located at C:\Documents and Settings\username\Application Data\Microsoft\Excel\XLSTART
We could use the VBA, here is a sample:
If ActiveWorkbook.CreateBackup = True Then
MsgBox "Remember, there is a backup copy of this workbook"
End If
http://msdn.microsoft.com/en-us/library/office/ff196337(v=office.14).aspx
If you had any further question, please post to MSDN forum:
http://social.msdn.microsoft.com/Forums/en-US/home?forum=exceldev&filter=alltypes&sort=lastpostdesc
Regards,
George Zhao
TechNet Community Support