How do i use XY Line graph in Ireport?

Main DB Query : SELECT users_vs_msg."coalesce" AS year_month, users_vs_msg."messages_sent" AS msg_sent,users_vs_msg."users_registered" AS users_registeredFROM "public"."users_vs_msg" users_vs_msg Fields that i get from it are

$F{year_month}, $F{msg_sent}, $F{users_registered } Dbl click chart > "chart tab" > edit chart properties> tab "chart data"> tab "Details"> Key Expression : $F{year_month} Value expression : $F{msg_sent} Label Expression : $F{year_month}

Dbl click chart > "chart tab" > edit chart properties> tab "chart data"> tab "Details"> Category series Add a category …with these values Series Expression : $F{year_month} Category expression : $F{year_month} Value Expression : $F{msg_sent} Label: empty