gmail on Hero has problems fetching incoming mail

[Constance]

Hello everyone,

I've got the weirdest problem ever with my HTC Hero.

The gmail application does not refresh automatically so as to fetch incoming e-mail. Even worse, it doesn't even do that when I manually do that (menu --> refresh)

There is one situation: If I change one of the settings for
Labels ("description = select which labels are syncronised") it does fetch e-mail from my inbox, but only if I manually refresh.

It doesn't make any sense that my gmail application can only fetch new mails after a (random) modifcation in my settings. I would like my gmail to refresh .... well.. as often as possible and automatically, since I will not know beforehand when someone has sent me a mail.

For the moment my label settings are as follows:
days for syncronisation: 1 day
currently all my labels are marked ?sync all?

and in my general Hero settings active synchronization is on.

Thanks for your help people!!!