Question : iphone 3gs email with exchange server

I cant seem to get this to work. My iphone email were working fine though last week the certificate expired and a new one was purchased sll certificate. Well now when i put the user information on the iphone it validates it fine no error message. Though when i open email it has not synced the folders displayed on outlook. Only inbox and draft and it says sync and no error though I cant see any emails? also when i tried to send test email it created an out box folder and send cant send. any ideas?   people using blackberry are not having this problems. i am able to access it via safari and the Internet so the set up seems fine.

Answer : iphone 3gs email with exchange server

we have already covered almost everything in this article, but please review (don't repeat steps you have already done) to see if there is anytning we missed
http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_1798-Exchange-2003-Activesync-Connection-Problems-FAQ.html