BB Torch :: 9800 Unable To Show Up Email In Message Folder?

I had my BB Torch 9800 for few month. Previously used to work fine, all my emails used to show up in message folder. But these days when I receive emails my bb flashes red and it shows on top of the screen emails icon. But when I open my messages folder it shows empty folder without any emails, even though I can see the email icon showing there is emails awaiting. I do aware of this option that, if I press bb menu and then press show all, my email address with my name will show up. With this way I can view received emails. But I don't want to use this option, as I prefer all my emails goes to message folder, that way I can have more space to download other apps.

Note: if i reboot my device all emails shows up in message folder! I don't want to reboot my device everytime I face this problem.