Unable to script out a publication. Getting error Msg 18456, Level 14, State 1, Line 1 Login failed for user 'distributor_admin'.

Hi I'm unable to script out a publication when I try script out I get this error

Unable to script out a publication. Getting error Msg 18456, Level 14, State 1, Line 1 Login failed for user 'distributor_admin'.

When I tried to see the publisher properties I get this error "The administrative link password required to connect to the distributor has been changed. Enter the new password in the following form"

We are using remote distributor.  Any idea why I get this error?

Thanks

SK