Go Below URL :
http://www.magentocommerce.com/magento-connect/Magento+Core/extension/159/ideal-extension
Then You go Magento Connect Manager ->
Again You login same admin user & password.
Now go setting –> There you change Preferred State to “beta”.
In the settings tab of the magentoconnect manager set the preferred state to: Beta and the install wil go.
then you go to install that is working well.
That’s all. 🙂