Wouldn't it be easier to have both the animation sequences in one sequence.. eg:
1 - 6 walking animation
7 - 12 running animation
When you want him to run you just bump the frame index by 6 so it then indexes the running animation (7 to 12) and return it to the default when he's walking (1 to 6).
1 - 6 walking animation
7 - 12 running animation
When you want him to run you just bump the frame index by 6 so it then indexes the running animation (7 to 12) and return it to the default when he's walking (1 to 6).