I recommend going into the C;\ProgramData\SolarWinds\Installers (for Widnows 2008) or C:\Documents and Settings\All Users\Application Data\SolarWinds\Installers (for Windows 2003) and selecting both the JobEnginev2.msi and the CollectorInstaller.msi, select remove, then rerun to re-install. That should help with the service flapping. If you are still not collecting data after that, make sure the nodes in the nodes table are all assigned to the new server (if you used the database from another installation). This can be done in Manage Nodes by selecting the polling engine as the sorting method. If there was an older server, then they need to be re-assigned. This can be done by selecting all, then editing and changing the poller.