For no apparent reason I cannot access my subfolders when I access BT mail through webmail. I see the "My Folders" label and its little arrow but when I try to access them, it very quickly lists them fleetingly and then shows the mail from the first subfolder. It's as though I have pressed the screen continuously and I haven't. More worryingly, when I try to go back, it goes straight back to the login screen and I have re-input credentials. The main folders work fine, it's just access to the sub folders which appears to be compromised. It used to work.