Audiovox SMT 5600 / SPV C500 (HTC Typhoon)

I have set up my AV with a gmail and AOL and set the phone to check for new mail every 15 minutes. the device connects to the web fine, but never pops into the accounts. I have set them up and deleted them a few times and nothing works consistently. Sometimes during the middle of the night i will get the alert that it connected and downloaded the emails, but does not connect consistently. the emails will just sit in my inbox. Is there a setting on the phone that i must do to enable access all the time and not just during active data sessions?

anyone else have this issue with the device not connecting to pop or imap accounts and downloading new emails?

thanks in advance