SharePoint Application Template Error

Action: when user trying to create new site using sharepoint Application template

Error:
Feature '75a0fea7-c54f-46b9-86b1-2e103a8fedba' is not installed in thisfarm, and can not be added to this scope.

Solution:
Did you install the Application Template Core prior to installing the ProjectTracking Workspace?

If not, you would have to do that first, and then re-install the ProjectTracking Workspace.

step1: First install ApplicationTemplateCore

• stsadm -o addsolution -filename "C:\ApplicationTemplateCore.wsp"
• stsadm -o deploysolution -name "ApplicationTemplateCore.wsp" -allowgacdeployment -immediate -force
• stsadm -o copyappbincontent

step2:Install your selected Application template

• stsadm -o addsolution -filename "C:\Inetpub\wwwroot\wss\VirtualDirectories\WSP\ProjectTrackingWorkspace.wsp"
• stsadm -o deploysolution -name "ProjectTrackingWorkspace.wsp" -allowgacdeployment -immediate -force
• stsadm -o copyappbincontent