wixsharp service not getting installed - service

Question

This may be a newbie question so excuse me for that.
My installation works fine without any error, All the files get copied to the install folder BUT there is no service installed? Any help is appreciated.
I have a simple installation that copies few files into the install directory and then installs the service from one of the installed files. Here is the my program.cs relevant code
WixSharp.File service;
var project = new ManagedProject("DMACSServer",
new Dir( #"%ProgramFiles%\DRR\DMACS SLM",
new DirFiles(#"Z:\DEV\current\FrameworkDLLS\*.*")));
new Dir(#"%ProgramFiles%\DRR\DMACS SLM",
service = new WixSharp.File(#"Z:\DEV\current\FrameworkDLLS\SLMService.exe"));
service.ServiceInstaller = new ServiceInstaller
{
Name = "DMACS SLM Service",
StartOn = SvcEvent.Install, //set it to null if you don't want service to start as during deployment
StopOn = SvcEvent.InstallUninstall_Wait,
RemoveOn = SvcEvent.Uninstall_Wait,
//DelayedAutoStart = true,
};
project.GUID = new Guid("97b17bfe-6086-4072-8f23-6859a44c4fa4");
project.MajorUpgradeStrategy = MajorUpgradeStrategy.Default;
project.ManagedUI = ManagedUI.Empty; //no standard UI dialogs
project.ManagedUI = ManagedUI.Default; //all standard UI dialogs
//custom set of standard UI dialogs
project.ManagedUI = new ManagedUI();
project.ManagedUI.InstallDialogs.Add(Dialogs.Welcome)
.Add<EnvironmentDialog>()
.Add<RolesDialog>()
.Add(Dialogs.InstallDir)
.Add(Dialogs.Progress)
.Add(Dialogs.Exit);
project.ManagedUI.ModifyDialogs.Add(Dialogs.MaintenanceType)
.Add(Dialogs.Features)
.Add(Dialogs.Progress)
.Add(Dialogs.Exit);
project.Load += Msi_Load;
project.BeforeInstall += Msi_BeforeInstall;
project.AfterInstall += Msi_AfterInstall;
project.PreserveTempFiles = true;
//project.SourceBaseDir = "<input dir path>";
//project.OutDir = "<output dir path>";
project.BuildMsi();