Sync zoho with exchange activesync

How can I sync my calendar and my mail to my mobile (HTC Desire with android 2.2) using exchange activeSync?
Is there an specific app?
What are the data connection?

I have try with TouchDown (v5.1). ID: myid@zoho.com, email: myid@zoho.com, server: msync.zoho.com, SSL: enable.
Connection log:
Checking certificate... Checking ActiveSync with SSL... AUTHENTIFICATION FAILURE privisioning ActiveSync:Check your credentials. ActiveSync version check returned negative, but still trying for 12.1

Thx

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