The standard install for AX2009 and AX2009SP1 does not allow you to run multiple workflow instances on the one machine. There is a KB article which explains how to do it. It requires an install. https://mbs.microsoft.com/knowledgebase/KBDisplay.aspx?scid=kb;en-us;960801 After the install you essentially copy the workflow folder, virtual directory and application pool in IIS. Create your config file (*.axc) and point the web.config file to it.