ram upgrade failed

[amint97]

hello, after i installed RAM 4gb ddr3l to asus x455lj, i can't plug the charger .. it will keep rebooting.. after removing the ram, it works fine.. what should i do if i want to upgrade??

 

[rgd1101]

exact model of the ram?

something like these http://www.crucial.com/usa/en/compatible-upgrade-for/ASUS/x455lj ?