Sheets problem

Hi,

I'm in the process of switching over from google docs to zoho docs and am noticing a big (for me) problem. I use spreadsheets to keep track of some student information and instrument inventories for my school. When I go to open a spreadsheet that I moved over from google, and go to open up another sheet within the spreadsheet, I get an error message that say something like "problem opening sheet" and the sheet won't open.

This is a MAJOR issue for me and I'd have to stick with google docs if it can't be resolved.

Otherwise, I'm happy with how zoho is working!

Thanks,
Anthony