sub folder

Hey all. I have just set up EM Client. I love everything about it so far, except that it doesn’t seem to be syncing my subfolders. It’s a standard mail server (IMAP) setup. Not one of the bigger Gmail, Yahoo, etc mail accounts. It definitely isn’t the server that has a problem with it, in Thunderbird, it synced automatically when setting up the account. If anyone can advice on how to get this sorted, I would really appreciate it!