Getting no Class exp

As the title says, how come i get no class exp? this occurred yesterday on a new class for me, the Sentinel.

If you are a high level compared to your class, then you won't get much if any.

If you are at least level 60 you should go for BattlegroundE.

well i am lvl39, and tried battling several monsters but it makes no difference, any suggestions?

Thanks anyway

On level 39 you should farm on /timespace map.
Find a full room and load the "Generic Attack Bot"