well I found why some lvw5005 have 3 hours other don't.
When I go to liteonit site, they ask for the serial, and my serial start 0102, (made oct 04) and it's give me the LNFA1091.ESU.0102.184x.rar file. this is the 1091 and no 3 hours.
I install this firmware.
Now I try with serial start at 0104 and it's give me LNHA1092.ESU.0104.184x.rar the 1092 version, supposed to have the 3 hours recording.
I try to install, and it's doesn't work, no message for upgrading.
I would like to have the 3 hours recording, but how can I make it?
So, conclusion, there is 2 model hardware, not compatible firmware, the serial start with 0102 (no 3 hours) and 0104 (with 3 hours)
This not solve my problem, but mayby someone can find a solution. Mayby editing the 1091, but I have no informations about this.