Why isn't shadow appearing?

[Ed]

The text appears, and the \[code\]@color/blue\[/code\] is fine elsewhere in the code, what else is preventing the shadow from appearing? I have tried values of 1, 10, and 100 for the \[code\]shadowDx\[/code\] & \[code\]shadowDy\[/code\] as well as \[code\]shadowRadius\[/code\]. The shadow does not appear either in the editor (which apparently is expected TextView shadow not showing up in preview - although working on real device) or on my phone, which is my testing device.\[code\] <TextView android:id="@+id/shadow_text" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center" android:text="i should be shadowed ..." android:textColor="@android:color/white" android:shadowColor="@color/blue" android:shadowRadius="2" android:shadowDx="1" android:shadowDy="1" android:textSize="@dimen/text" />\[/code\]