ok, I'll look into it.
in the meantime, please, also make sure your preferences are saved, i.e. check 'oscar.ini' to see if your login credentials are stored in SERVERS section. If not try pressing the 'Save' button in 'Preferences'.
also check the 'Log' tab. Attempts to login (and get token) should be displayed there. See if there are any errors logged. if not send me a sample log output via PM.