IIS service node is in "Unknown" state while you checking Infrastructure > Services.
On IIS service node in
C:\Program Files\SWsoft\PEM\Logs\poa.debug.loglog you can find the following error:
DBG [SYSTEM 6:1756:820 pleskd]: [HSMLog] Cannot get state of service: FTPSVC DBG [SYSTEM 6:1756:820 pleskd]: [HSStateMonitor::checkHSState] current_state is 'u'; required_state is 'a'
This is software issue in Paralels Plesk Automation - it could not detect Windows 2008 native 7.0 FTP server because service has name "MSFTPSVC", not "FTPSVC". Internal request id TP-137160 - it will be fixed in future releases.
As a workaround you can install Microsoft FTP Service 7.5 for IIS 7.0: