First post reminder in specific topics

Hi, I'm trying to disable first post reminder in some topic. I tried this tutorial but it is not working. Could someone help me with this?

what is your forum version?

ModernBB

Did you save the changes in the templates and publish the templates?  Also is JavaScript Management activated?

Yes, I did it all right.

Is the forum in your profile the one in question?  If yes, I get the forum does not exist message.

Oh, that was the wrong site. Now I already change it to the right one. I can send test account to your private message so you can have access to the forum.

PM received.

After I added !important to the CSS code, the first message was removed form this topic on page 2 and 3:  https://rpg-eon.forumotion.eu/t9p100-city-center-of-fort-antares

Ok, thank you. But I have another issue. When i add <!--first_post--> so the reminder would show on other pages, it's not working. Html is allowed but when i cancel the checkmark on "Options" > "Disable HTML in this post" and then I hit send... it shows the code and the "Disable HTML in this post" is marked again.

Do you have HTML activated in your profile?

Profile > Preferences

Yes, that was the problem but the reminder is still not on the other pages.

Are you adding the code at the end of the first post?

Yes, in the end. Like this

I located the issue.  You did not have force default CSS checked to yes.  The option is below the CSS stylesheet.

Ah, ok. Understand, thank you so much