You would export your Timeline to a video file type supported by Vimeo, saving that file to the computer hard drive.
From the computer hard drive you would upload your file to Vimeo at the Vimeo web site.
Please let us know if you have any further questions or need clarifications on Premiere Elements 9.0/9.0.1 Share/Computer/Online.
If you would like assistance for creating the file to be uploaded to Vimeo at the Vimeo web site, then please give us the details of your
project so that we can suggest appropriate settings.