Can only get into Zoho mail through Google

Can only get into Zoho mail through Google

Hi,
 
For some reason, when I put in my user name and password I cannot get into Zoho Mail.When I click on the "Access through Google" that appears below the dropdown windows for un and pw, though, I get in.
 
Can someone please help me? I am trying to sync this email account to my Hotmail account but it won't work.
Thanks, Lindsey