I seem to be having the same problem. Mails only seem to come when I manually hit "Send / Receive", even if I am in a good service area with plenty of bars.
I am using Tiggit Mail v. 1.1.18.3 api 4.2, my BlackBerry is a Storm 8330m on MetroPCS, I believe the OS version is 4.5.0.127 (Platform 3.4.0.21). I selected the Tiggit api 4.2 because it said if in doubt to chose that one. Maybe I should be using a different api version of Tiggit?
I have a BIS through them, but of course it doesn't do proper support for IMAP folders, which is what I use your software for. Push works great through the native BB client, but only for Inbox which is useless for me as I have numerous sub-folders (where emails are automatically sorted into upon arrival at the server). At this point it seems as if I can either have my instant push email, or my folders, but not both (or go with some radical solution such as setting up my own BES or doing something inelagant like making a bunch of separate email addresses, all with their own Inboxes).

But perhaps you can help...
