Maven failure when I'm trying to build my project

[Sench]

 Hi,
Well I've configured Continuum 1.1 under the tomcat 5.5.20.
After adding my pom.xml url , continuum checkouts my project as well. But
when I'm trying to build my project I'm getting failure like this

'mvn' is not recognized as an internal or external command,
operable program or batch file.

Why? I've also added system variable (maven-2.0.8/bin) to recognize
this command.

How can I solve this?

Thanks, Arsen