Below here are links to Lifeline Firmware Version 4.0.4.14600 (7/16/2013)

Firmware Version 4.0.4.14600 for EZ Media & Backup Center 
http://download.lenovo.com/lenovoemc/eu/en/app/answers/detail/a_id/32028.html

Firmware Version 4.0.4.14600 for ix2 and ix2-dl

http://download.lenovo.com/lenovoemc/eu/en/app/answers/detail/a_id/31178.html

Firmware Version 4.0.4.14600 for ix4-300d

http://download.lenovo.com/lenovoemc/eu/en/app/answers/detail/a_id/32096.html

Firmware Version 4.0.4.14600 for px2-300d

http://download.lenovo.com/lenovoemc/eu/en/app/answers/detail/a_id/32094.html

Firmware Version 4.0.4.14600 for px4-300d

http://download.lenovo.com/lenovoemc/eu/en/app/answers/detail/a_id/27363.html

Firmware Version 4.0.4.14600 for px6-300d

http://download.lenovo.com/lenovoemc/eu/en/app/answers/detail/a_id/27366.html

Firmware Version 4.0.4.14600 for px4-300r

http://download.lenovo.com/lenovoemc/eu/en/app/answers/detail/a_id/27368.html

Firmware Version 4.0.4.14600 for px12-350r and ix12-300r

http://download.lenovo.com/lenovoemc/eu/en/app/answers/detail/a_id/23142.html

Firmware Version 4.0.4.14600 for px12-450r and px12-400r

http://download.lenovo.com/lenovoemc/eu/en/app/answers/detail/a_id/32092.html