To all who responded to this topic. Assuming you have not created and then deleted forms you should all have a form with an id of 1. These are listed on the forms tab, all the way to the right. The syntax is then {pmform 1} inserted into the article as plain text. This is not legal HTML code, but the plugin interprets it as such and the form should appear. I suspect that this is 'iffy" and works for some and not others, all I can say is it worked for me.
Second: everone refers to this in the documentation, but I can't find that file. All the documentation on joomla.org and via company website is a single page or so, no mention of the {pmform x} syntax. Can someone point me to it, or send me the file?
Dave Sause, oldandfat@cox.net :S