I have developed a solution in Visual Studio 2008 C# WPF! I'm using a service-base SQL database (I've created and managed using Microsoft Visual Studio Sever Explorer), now I'm going to publish it but the problem is that when I install .NET Framework 4.0 and SQLEXPRESS 2005 on other systems, my application doesn't launch! :-( What componenets should I install on the systems to make it runnable?
If you develop with Visual Studio 2008 you will probably need to install .NET Framework 3.5 with Service Pack 1.
If that is not enough you need to post the error you get. Probably in the eventviewer you will see more info.
You can try to create a setup using Clickonce. To do this you need to go to the property pages of the WPF project an go to the tab Publish.
There you can choose to publish it to the network or to a local directory which can be put on a CD or USB device. The most important thing for you to check is the button "Prerequisites".
I hope this helps!
EDIT to help with the comments:
It is perfectly possible to put the prerequisites in the same folder as the install or even better in a fixed network location as you can see in this screenshot below