Hello I have dreamweaver 5.5 build 11.5, I have tried to load the mailer extension only to be told I need to have build 12. I have looked on the adobe website and they do not give updates to build 12
www.adobe.com/support/dreamweaver/downloads_updaters.html

I will not be upgrading to dreamweaver version 6 but cannot find how to upgrade to build 12 for version 5.5. How can I get to use your extension please.

It was the PHP validation Extension that was causing this error and Thank you to Miro for resolving this issue and sending me another validation extension.