[imp] IMAP folders not showing in dropdown menus

[Burn]

Hello guys,

I've been struggling with this a while now, and still can't find a solution. 
My IMP installation 3.2.3 is working flawlessly so far, exception made for 
the folders management part of it.

I can create folders (Qmail/vpopmail) successfully but they never appear in 
the dropdowns inside IMP. The system is set up to use the .maildir folder. 
Access protocol is set to imap/ssl/novalidate-cert.

Any suggestions?

Luca