Exchange Active Sync Message Format Problem

[vivhero]

Hi,

I just set my HTC Hero to sync with our Exchange Server 2003. Everything works fine except the Message Format under Mail settings is grayed out to Plain Text and thus, I'm not able to get any html formatted emails (no image, table etc). HTC support page shows I should be able to choose html message format, but I'm not.

http://www.htc.com/www/howto.aspx?p_id=283&id=38&f=t

Has anyone else experienced this problem? How do I fix it (any server side setting or anything else on Hero)?

Thanks,
-vivek