RevMob Banner not showing

Hi there everyone, I just finished my 2D game for android and I want to add a RevMob Banner Ad the whole time, in a specific scene only.

At this point I have imported the RevMob SDK, copied the android SDK to my game folder, edited AndroidManifest, edited proguard txt.

I think I’m missing something whith my code and not calling the banner ads the right way.

import System.Collections.Generic;

private var APP_IDS = new Dictionary.<String, String>();
private var revmob : RevMob;
 
function Awake() {
 
    APP_IDS["Android"] = "53d449de47ee20b00633ed50";
    APP_IDS["IOS"] = "QWERTYUIOP";
    revmob = RevMob.Start(APP_IDS, this.gameObject.name);
}
 
function Start () {
 
    banner = revmob.CreateBanner(RevMob.Position.TOP, 0, 0, 350, 50);
    banner.Show();
 
}

With this code that I got from RevMob Im getting unity:red:notice = unknown ientifier: ‘banner’.

Any suggestions or ideas how to make this work?

notes = “” I did check the forums & answers % youtube videos for a solution “”

You are not initializing the variable banner say:

RevMobBanner banner = revmob.CreateBanner(RevMob.Position.TOP, 0, 0, 350, 50);