According to Rainisto, the correct way to flash to open mode is to flash the device back-to-back, that way it should work best.

How to do it, You need to flash first to Closed mode, then to Open mode, without device booting between.

If you have Linux, you can give the flashing commands on the same command line, like this:
"sudo flasher -F firmware.bin -F emmc.bin -f -R ; sudo flasher -a firmware.bin -k zImage_2.6.32.54-openmode_l2fix --flash-only=kernel -f -R"

If you have Windows, you can copy-paste the commands from a notepad or something to the console, giving the second command after the first has executed. Or you can have 2 DOS consoles open with the command written there and first press enter on the first, and when it has finished, on the second.