I didn't have much luck when using the DOS commands at first either.
Not sure if it was my computer or what.
You may want to try th GUI software. Works good and is easier than doing the dos prompt stuff.
http://www.thirdgen.org/techboard/di...730-727-a.html (nvsram module for 730 / 727 / 749)
Its in the second link MonteCarSlow posted in this thread.
You may want to get the latest TcL stuff from the site depending on your system.
Make sure your base chip (on the adapter) is programmed correctly and inserted right.
That would cause problems too because the ECM software and code for Mode 4 wouldn't be running.