Setting papersize - B5 and ledger not being set!

Hi,
We are currently using aspose cells for .Net (ver 4.8.2.13).
I am trying to set the papersize property to different options like A4, letter etc. While the others work fine, when i set it to B5 or Ledger, the created excel file seems to ignore it.
When i open the excel file and go to File -> Page Setup - the Paper size drop down comes up as blank.

Any idea why only these 2 are being ignored?
Please let me know.

thanks,
Jaideep.

Hi,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

Well, you may not be able to see Ledger or B5 page size options because your default printer might not support these page sizes. PageSetup options in MS Excel depend on the settings of your printer. If your printer does not support some page size, then in Excel PageSetup, it will be shown as blank.

Thank You & Best Regards,