activesync not working

activesync not working

i see many threads about android and activesync, however none have had my symptom (from what i can see...)

firstly, i am new to zoho mail - seems an impressive package and maybe enough to move me away from gmail. mobile sync is the only thing stopping me migrating right now!

i've configured my phone and it appears to like it (no errors).
however, i am getting no data sync - calendar, contacts or email. email i send on my phone via zoho just gets stuck in the outbox.

the phone is a nexus one, running 2.3.7.