stsadm -o execadmsvcjobs

When deploying a Solution, Feature or Form a message is shown
"Solution XPTO is not being executed because the administration service on this server is not started. This job definition can be run manually using 'stsadm -o execadmsvcjobs'"

Solution:
1- Go to Services.msc on your server
2- Start the service called "windows sharepoint services administration" or  "SharePoint 2010 Administration". Depends on what version you have 2007 or 2010
3- Now your jobs gets executed in time.