okay try this.
Open up Xterminal as root.

sudo gainroot

Type this first line in after you get the error message as soon as you see it, switch back to Xterminal and type:

chmod +x /usr/sbin/fmtxd
killall fmtxd
fmtxd -d


Then closed down your media player and go to Setting->FM Transmitter -> enable -> Done.

If you still get the error then re-run the:
killall fmtxd
fmtxd -d

Open up media player and play a music and go back to Setting -> FM Transmitter and enable it -> Done.

Now you should be able to enable it. Reboot may help as well

I got the error at first but after it enabled it got stucked at enable, then I run the killall command and restart FMTXD daemon and voila works! You have to have FM-Faker install at the last thing when you got the error run those commands and then install FM-Faker after that.

Once in a while you'll get the error message, just kill it and rerun the fmtxd and it should be fine