FPS Run Animation Gun - Rotation Issue

when I tried to make the Run Animation I changed the rotation of the weapon -60 degrees . When the run animation was being interupted by the walk animation (for example when you Get the button up) my weapon does not change its rotation to the default of the walk animation (0 degrees), but it just stays the same -60 degrees.. how can i fix that? There is my video with this problem on youtube --> link text