Sorry for my next question - but anything goes wrong

When i try to apply the firmware on my WR41v2 and select as W-WAN Module "13 - Ericsson F3507g/ F3607gw/F3307/F5521gw HSDPA Module" in the FlashWriter Vers. 1.0.503 and Firmware Version 52145 for WR41v2 - I recieved allways the message "W-WAN module failed check - please check you selected the correct module!"
The router PN is WR41-U7T1-DE1-ZZ and so the "13 - Ericsson F3507g/ F3607gw/F3307/F5521gw HSDPA Module" should be the correct one.
When I change the ini file and delete setwanmodule - it will apply Novatel - and this doesn't work after apply the firmware. The modems is not running