Error While Uninstalling the MSI Installer

Question

Hi ,
 I Developed a windows Deployment Application.It contains One Windows Application,Windows Service and Custom Action Application.Some Times While Uninstalling Windows service is Removed and Uninstall process is Stopped.And It is showing an error that Specified service doesn't exist.Then I am manually installing the Windows Service from Visual studio 2005 Command Prompt.then Uninstall Process is Succeeded.But it is not possible at client System.Can any one Tell me How to Uninstall Application Completely even though one of the Project Removed.

Thanks in Advance,