pass parameter via link to zsurvey

pass parameter via link to zsurvey

HI I am trying to pass a few parameters from the crm to zoho survey via a link.

from crm                                    in survey field (value)
lead first name                           first name (FName)
lead last name                           last name (LName)
lead email address                    email (EmailID)  
lead id                                        lead id (LeadID)

this goes into survey link 
I was under the impression that I need to pass it in this manner:

survey.zoho.com?Fname= ${Leads.First Name}&Lname=$ ${Leads.Last Name}&Emailid= ${Leads.Email}&LeadID= ${Leads.Lead Id}

my problem is two fold:

1.I cant get the passed values to show up in the survey in their appropriate fields
2.url's dont like spaces- for example  ${Leads.First Name} :  I have tried to use %20 as a space, but it doesn't work

any ideas how to resolve this?