The only work around we found was to install an older version.
Thank you for your posts.
We have had reports that FileMaker Pro 11.0v3 no longer works with Entourage 2004, but it should work with Entourage 2008. In one instance, we did see it fail with Entourage 2008, but that was because there was no account set up. Once an account was set up, the Send Mail script worked correctly.
Any other information you can provide may be helpful.