SL8082 + WDTMF not working

Hi!
We are using WDTMF command to make some beep on speaker output. It works with FW 7_54_0, but it won’t do any sound with FW 7_54_2 and with 7_54_1. 7_54_2 is the latest release. Any idea?
Thanks!
With regards,
Gabor