Build working on PC but not on Android

I am doing a project in Vuforia using AssetBundles. I created an AssetBundle with the Build Target as Android.When I run this on the Unity editor it works fine.But when I build the apk and run on the android phone it doesnt work. My assetbundle is a texture and I have a code that downloads and displays it on a Quad. While I am able to see on the editor,I am unable to achieve the same result in android.I need your help on this.Thanks