node: not found error

[harlanc]

root@dd:/git/licode-demos# npm start

[email protected] start /git/licode-demos
node app.js

sh: 1: node: not found
npm ERR! weird error 127
npm WARN This failure might be due to the use of legacy binary "node"
npm WARN For further explanations, please read
/usr/share/doc/nodejs/README.Debian

npm ERR! not ok code 0

my nodejs version:
root@dd:/git/licode-demos# nodejs --version
v0.10.25