Hello all,
i just started using Yii and i was trying to figure out how the phonebook demo works… but i just get stuck in the beginning…
iam using xampp 1.71 (php version : 5.2.9)
Everytime i fill the login/password field with demo/demo then click ‘login’, then it took a while before saying “Data Communitacion Error”, sometimes it also ended with my windows 7 says that my apache is not responding…
hope somebody can help 
somebody help me please 
You need to make sure that all the prerequisites for the framework are installed. Most notably sqllite.
In ubuntu
sudo apt-get install php5-sqlite
In Redhat
yum install php5-sqllite
This may indicate that you need some of the other prerequisites.
Take a look at requirements.php as detailed here…
http://blog.dmcinsights.com/2009/06/18/introduction-to-the-yii-framework/
I had the same problem. I ran the Yii requirements checker at:
http://localhost/yii/requirements/
and found that the DOM extension was not installed. Since my server is Linux, I installed it with the command:
yum install php-dom
Now it works.
I hope this helps.