Customisations not showing

Customisations not showing

Hi, I've spent weeks customising the ZOHO CRM and then all of a sudden yesterday the data entry pages have reverted to the original fields.  When I go into set up, all of my customised fields are there and in the position I want but they are not showing on the working page where you enter information.  No-one is on the support desk and I'm freaking out - can anyone shed some light on this?

Nicole