Thanks again my CU400 unlocked sucessfully.
1st go to support download last update LGQ_1_17SC.rar and file CU400_V10b-CINGULAR[UNLOCKED]-EN_ES_FR.rar from support.
1- Install LG USB Drivers if not already in your PC (archive inside update archive LGQ_1_17SC.rar) and connect phone windows should find phone and install it automatically. When you see your hardware is installed and ready to use then go to next step.
2- Click on connect port
3- Click on connect phone
4- Read NVM and save it (dont feel lazy to do it)
5- Click on "flasher" tab
6- Click on folder icon button to search the file "CU400_V10b-CINGULAR[UNLOCKED]-EN_ES_FR.crc"
7- Click on "write files & do jobs"
In my case, 1st try something goes wrong. Dont panic, try reconnect phone by pressing 2+5+power button you will see "download mode" on phone screen. Re-do step all steps except 4. When finish you will be prompted to write back NVM cause after flashing by emergency mode this area is erased. For this do step 2, 3 and click on tab "unlocker", click on NVM write then choose your backup will be by default your phone imei name like this NV_CU400_011226-00-xxxxxx-x_2007_10_21_20_36.nv2
Now your phone is unlocked and fully working !!!