Kicking is it...

I been getting slaughtered in the fast lane when it comes to kicking.  Been trying so hard to figure out what is wrong.  The first two weeks with the team I noticed that my pulls are right with the fastest swimmers but when it comes to kick, I go back to the end of the line.  So we been talking about it and the others have been helping me out with my kick.  So now on my own training days all I do is KICK.  Last night did 2.5k kick and 15 mins tread kick.  Needless to say, my legs are sore!