Slider Background is not filled

[renjithkrish89]

When I used the Slider
<com.gc.materialdesign.views.Slider android:id="@+id/sensitivtyValue" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_centerInParent="true" android:background="#E0845B" materialdesign:max="8" materialdesign:min="1" materialdesign:showNumberIndicator="true" /> the slide is not filling

like the image. How can I fix it. When I use min as 0 and Maximum as 100 it is working correctly