[possibly OT] squirrelmail login problem

[Sharninder Singh-662 <Sharninder.Singh-662@ushacomm.co.in>]

i recently upgraded to testin from stable. i had squirrelmail 1.4.0 under
stable and have the same version under testing also now. but it refuses to
authenticate the users and shows some error saying invalid user etc. all the
configurations are fine. what could be the problem...
when i telnet to port 143 ... i get conenct but in square brackets the
UW-IMAP server shows somthing like [CAPABILITY ...... LOGINDISABLED ....]
what does this mean .. and how can i enable LOGINS
...
sharninder