Ionic 2 serve not working? HELP ME

hello. Can you help me for ionic 2?
ionic serve not working? what solve?

this error for ionic serve

C:\Users\Lg\ionic2deneme>ionic serve

> ionic-hello-world@ ionic:serve C:\Users\Lg\ionic2deneme
> ionic-app-scripts serve

module.js:327
throw err;
^

Error: Cannot find module 'reflect-metadata'
at Function.Module._resolveFilename (module.js:325:15)
at Function.Module._load (module.js:276:25)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)
at Object.<anonymous> (C:\Users\Lg\ionic2deneme\node_modules\@ionic\app-scripts\dist\aot\aot-compiler.js:4:1)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Module.require (module.js:353:17)

npm ERR! Windows_NT 10.0.14393
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "run" "ionic:serve" "--"
npm ERR! node v4.6.0
npm ERR! npm  v2.15.9
npm ERR! code ELIFECYCLE
npm ERR! ionic-hello-world@ ionic:serve: `ionic-app-scripts serve`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the ionic-hello-world@ ionic:serve script 'ionic-app-scripts serve'.
npm ERR! This is most likely a problem with the ionic-hello-world package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     ionic-app-scripts serve
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs ionic-hello-world
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!
npm ERR!     npm owner ls ionic-hello-world
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     C:\Users\Lg\ionic2deneme\npm-debug.log
There was an error serving your Ionic application: There was an error with the spawned command: serve

Hi sanalaraf149,

Which Node version you are using in your syatem???
I think for Ionic 2 you need node v 6.9.0 minimum…