Installation problem using composer in laravel 4.0

[sanjay-russmediatech]

Hi,
I'm a new bee in laravel. Please, let me know how to install this in laravel 4.0 using composer. I tried the same way describe in readme and get following errors.

Your requirements could not be resolved to an installable set of packages.

Problem 1
- Conclusion: remove laravel/framework 4.0.x-dev
- Conclusion: don't install laravel/framework 4.0.x-dev
- Conclusion: don't install laravel/framework v4.0.11
- Conclusion: don't install laravel/framework v4.0.10
- Conclusion: don't install laravel/framework v4.0.9
- Conclusion: don't install laravel/framework v4.0.8
- Conclusion: don't install laravel/framework v4.0.7
- Conclusion: don't install laravel/framework v4.0.6
- Conclusion: don't install laravel/framework v4.0.5
- Conclusion: don't install laravel/framework v4.0.4
- Conclusion: don't install laravel/framework v4.0.3
- Conclusion: don't install laravel/framework v4.0.2
- Conclusion: don't install laravel/framework v4.0.1
- Conclusion: don't install laravel/framework v4.0.0
- Installation request for davibennun/laravel-push-notification dev-master -> satisfiable by davibennun/laravel-push-notification[dev-master].
- Conclusion: don't install laravel/framework v4.0.0-BETA4
- Conclusion: don't install laravel/framework v4.0.0-BETA3
- davibennun/laravel-push-notification dev-master requires illuminate/support ~4.2 -> satisfiable by laravel/framework[4.2.x-dev], illuminate/support[4.2.x-dev, v4.2.0-BETA1, v4.2.1, v4.2.2, v4.2.3, v4.2.4, v4.2.5, v4.2.6, v4.2.7, v4.2.8, v4.2.9].
- Can only install one of: laravel/framework[v4.0.0-BETA2, 4.2.x-dev].
- don't install illuminate/support 4.2.x-dev|don't install laravel/framework v4.0.0-BETA2
- don't install illuminate/support v4.2.0-BETA1|don't install laravel/framework v4.0.0-BETA2
- don't install illuminate/support v4.2.1|don't install laravel/framework v4.0.0-BETA2
- don't install illuminate/support v4.2.2|don't install laravel/framework v4.0.0-BETA2
- don't install illuminate/support v4.2.3|don't install laravel/framework v4.0.0-BETA2
- don't install illuminate/support v4.2.4|don't install laravel/framework v4.0.0-BETA2
- don't install illuminate/support v4.2.5|don't install laravel/framework v4.0.0-BETA2
- don't install illuminate/support v4.2.6|don't install laravel/framework v4.0.0-BETA2
- don't install illuminate/support v4.2.7|don't install laravel/framework v4.0.0-BETA2
- don't install illuminate/support v4.2.8|don't install laravel/framework v4.0.0-BETA2
- don't install illuminate/support v4.2.9|don't install laravel/framework v4.0.0-BETA2
- Installation request for laravel/framework 4.0.* -> satisfiable by laravel/framework[4.0.x-dev, v4.0.0, v4.0.0-BETA2, v4.0.0-BETA3, v4.0.0-BETA4, v4.0.1, v4.0.10, v4.0.11, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7, v4.0.8, v4.0.9].

Thanks in advance.