Missing input parameters, need:
?id=MODEL_ID[&name=MODEL_NAME]&vers=VERSION[&m=generate][&r=(0|1)]
(m=generate tells to create modified installer with parameters written inside (only if it doesn't exist),
r=1 redirect instantly to download the resulting installer, r=0 return URL to resulting installer without redirection, otherwise write log)

Example: http://download.openelement.com/Default.aspx?id=64&vers=1.24&m=generate&r=1 Installation