Thread: flashing 3750 Us to asia 3790 alarm problem

Hello all,
Bought a nuvi 3750 us version ( software 5 and firmware 2.60). After reading many threads ( particularly enable 3790 features on 3750) I downloaded asian firmware Nuvi3790 and Nuvi3750_CHN_V270, RGN tool ( thanks turbocc) and flashing with the following changes:

1- boot.bin (us ) + fw1 (CHN)+ fw_all ( CHN with HWID= 1101 , SW=2.70)
2-boot.bin (us)+fw_all (CHN with HWID=1101 , sw=2.70) +fw1(CHN)
3-boot.bin(us)+fw_all (CHN with HWID=1101, sw=500) +fw1(CHN)
4-boot.bin (CHN)+fw1(CHN)+fw_all(CHN)

Regardless if I use Nuvi3790 or Nuvi3750_CHN_V270 or even Nuvi3790_SG_320 , after successful flashing , I always get the alarm to pop-up blocking the maps to loads and the screen unresponsive. It will take about 5-10mins for the alarm to stop and be able to shut down the device.
Sometimes after rebooting the maps could load normally and I could get : media player, 3D, go to office, search by telephone, exit, etc.
What am I doing wrong for the alarm to always pop up at the startup? And how to stop it ?.
I have search the forum but seems no one had similar problem.
In advance thank you for your help.
Camissa