Asterisk dahdi change the echocancel value

I am looking for a solution for my echo problem with oslec echo canceler.
I get the echo always for the same called numbers
I want to change the parameter of echocancel for testing between yes, 128,256 values.
After execute module reload chan_dahdi.so
Command dahdi show cahnnel 1 always gives me the value “1 taps”

Any idea ?

Sorry find what is wrong if I put echocancel into users.conf it works
I will test