MPQ "map-injection" no longer working?

Whenever I "inject" the Units\UndeadAbilityStrings.txt into my map using an MPQ archiving program, the strings don't replace the default ones. Why?

I can't speak authoritatively, but I've heard that MPQ implanting doesn't work properly since the introduction of the Import Editor in TFT.

If you have TFT, the Import Editor works great.

it works fine 4 me with tft

Ninja doesn´t have TFT, get it already ;p