Topic: FF400 host keeps lid and another ff400 works

Hello, we have a MacPro Quad Core Intel Xeon, 8 GB RAM, OSX 10.5.7, with RME FF400 and 5.1 surround settings (Genelec). After updating FF400 firmware (it did work) RME host led keeps burning red. I connected another FF400 from another system (not updated) and this is working fine. Is it possible the firmware update did go wrong? Reconnecting the FF400 (not working one) led keeps burning red. I tried to reinstall the driver but did not fix the problem, also a PRAM reset MacPro did not do the work. Is it possible to reset the FF400 firmware?
Please help me. (first post)