I can't get my zoho account set up in Mac Mail

I can't get my zoho account set up in Mac Mail

I am following the instructions to download Zoho Mail through POP in Mac Mail so i can get my emails easily on my iphone... Every time i enter the server details given by ZOHO (included below), Mac Mail says that logging on to the POP server 'pop.zoho.com' has failed and check my password and username are correct. I have checked them and re entered all the details 20 times and it is correct but it wont work.... Any ideas??

Incoming Mail (POP3)
pop.zoho.com 
Use SSL: Yes 
Port: 995 
Outgoing Mail (SMTP)
smtp.zoho.com 
Use Authentication: Yes 
Use TLS: Yes 
Port: 465 
POP Account User Name:
your full email address (including @zoho.com) 
SMTP Account User Name:
just your user name alone ( the name that appears next to Logout link ) 
[ note :- Not your full email address here. ] 
Email Address:
your email address (username@zoho.com) 
Password:
your Zoho password.