When I go to the link the the LEM console to download the agent to setup an agent node I am connected to a link that seems broken.
http://downloads.solarwinds.com/solarwinds/Release/LEM/SolarWinds-LEM-v5.7.0-WindowsAgentInstaller.zip
The console links have been moved to the future 5.7.0 version, but they aren't live yet. You should be able to download all of the installers from the portal, or the equivalent link is:
http://downloads.solarwinds.com/solarwinds/Release/PreRelease13/RC/LEM570RC1/SolarWinds-LEM-v5.7.0-WindowsAgentInstaller
