Problemas com a conexão

Warning: mysqli_connect(): Headers and client library minor version mismatch. Headers:100508 Library:100236 in /home/u738459900/domains/ on line 137

Warning: mysqli_connect(): (28000/1045): Access denied for user 'u737283511_bd6'@'localhost' (using password: YES) in /home/u738459900/domains/ on line 137

Warning: mysqli_select_db() expects parameter 1 to be mysqli, boolean given in /home/u738459900/domains/ on line 138

Warning: mysqli_error() expects exactly 1 parameter, 0 given in /home/u738459900/domains/ on line 140
Não foi possível conectar: