SamyGO

What is your output if yo type in telnet

i can't open the second pic, it shows only the first half part.

ok, you are now on /dev/bml0/10 and /dev/bml0/11 therefor your backup is on /dev/bml0/8 and /dev/bml0/9.
according your code, you flashed on /dev/bml0/8 and /dev/bml0/9.
now you have to proove witch patitionswitch file exists:

if exists /mtd_rwarea/PartitionSwitch_1_0 you have to switch like this:
rm /mtd_rwarea/PartitionSwitch_1_0
touch /mtd_rwarea/PartitionSwitch_0_0 or

else if exists /mtd_rwarea/PartitionSwitch_0_0 like this:
rm /mtd_rwarea/PartitionSwitch_0_0
touch /mtd_rwarea/PartitionSwitch_1_0

another way is the version.* method, that you've used before, but partitionswitch ist the faster method i think.

if you write this line:

# echo SWU_T-CHL7DEUC_002004_I02_ES000DS000_090816 > Version.0

you have exactly to know witch Version file is in use now (Version.0 or Version.1) and then write the other one instead of Version.0.
But i don't know exactly whitch Version file uses whitch partitions.
Your actually partitions are /dev/bml0/10 and /dev/bml0/11 if you won't break the FW you are using now, you have to flash on /dev/bml0/8 and /dev/bml0/9.

the partitionswitch method is in principle the same like the version.* method.
If you will using the Version.* method you don't need the partition switch.