Autocad block layer

I entered my blocks in on layer zero but for some reason when i change the layer it remains on a different layer… so i tried editing it and exploding it and putting it on layer zero again and its not working… any chance u can help me…?

Go into editing mode for the block then fully select the block. Check that the color, lineweight and linetype is set to by layer in the properties panel.
If you go into the editing mode and when you are selecting it, it still has one grip it is a block in a block and you need to explode it inside the editing mode first.