Code:

$dbh_auto = DBI->connect('dbi:Sybase:server=XXXXXX;database=XXXXXX',$APP_SYB_USER,$APP_SYB_PASS);

Error :

DBI connect('server=XXXXXXX;database=XXXXX','xxxxx',...) failed: Server message number=4002 severity=14 state=1 line=0 server=XXXXXX text=Login failed.
OpenClient message: LAYER = (4) ORIGIN = (1) SEVERITY = (4) NUMBER = (44)
Server lon_gbe_sql_dev2, database
Message String: ct_connect(): protocol specific layer: external error: The attempt to connect to the server failed.