actor not being able to touch water ( HELP!!)

i would like to know how can i let my actor not able to touch the water (like it cant walk over it)
but i dont want to restart the level or something just not able to walk on it
this is a screenshot of the water and the actor that im working on
http://img153.imageshack.us/i/screenshot20110331at704.png/
Thank you
but i dont want to restart the level or something just not able to walk on it
this is a screenshot of the water and the actor that im working on
http://img153.imageshack.us/i/screenshot20110331at704.png/
Thank you
Comments
but i dont want to restart the level or something just not able to walk on it
this is a screenshot of the water and the actor that im working on
http://img153.imageshack.us/i/screenshot20110331at704.png/
Thank you
Cheers,
QS