Importing Contacts problem

Importing Contacts problem

I have a the free account and I am trying to import contacts into Zoho using my excel 2010 spreadsheet but every time I select import and go to the next step it goes to the next screen (uploading import file) and it never goes any further.  What am i doing wrong?

I have excel 2010
I have headers on the first row
I am using mozilla fire fox as my browser
I only have 102 records

Please help