HTML in posts are not working

i have enabled HTML in posts in the message configuration in AC
but when i create a topic, and i click the box to enable HTML in the post,
the coding i put in, isnt working, then when i edit it, it the box is set to disable, then to enable it again, and the same thing happens,

i have tried it with other simple codes, such as <h1> hi </h1> with correct tags but it isnt working,
can anyone help me?

Are you sure, you did this?
https://help.forumotion.com/t35636-enabling-html


If you have done the above, Hit the a/A button & then try.

ohhh. thankyou