I did a questionnaire with zoho for a research work. The problem is i havent gotten any feedback even when some friends told me they had answered the questionnaire one sent me this message  'the questionnaire opens a new window on d browser which after I finish completing, it only gives me the option to submit. And if I click on submit I thought it will go automatically but it keeps poppin up d message "PLS enter a valid email addy"'. I dont know how to solve this problem and i have sent this questionnaire link to alot of people.