Secure Calling TLS + SRTP

hello
i have a problem with secure calling , i don’t know what should i do
registred successful but call rejected
WARNING[32732][C-00000007]: sip/sdp_crypto.c:169 sdp_crypto_activate: Could not set SRTP policies
WARNING[32732][C-00000007]: sip/sdp_crypto.c:169 sdp_crypto_activate: Could not set SRTP policies
WARNING[32732][C-00000007]: chan_sip.c:10388 process_sdp: Rejecting secure audio stream without encryption details: audio 53283 RTP/SAVP 113 9 0 8 101
WARNING[327332]: config.c:2620 find_engine: Realtime mapping for ‘sippeers’ found to engine ‘ldap’, but the engine is not available

sip.conf
[global]
enable=yes
tlsenable=yes
tlsdontverifyserver=yes
tlsbindaddr=0.0.0.0
tlscertfile=/etc/cert/asterisk.pem
tlscafile=/etc/cert/ca.crt
tlscipher=ALL
tlsclientmethod=tlsv1

[100]
type=friend
secret=100
host=dynamic
defaultip=192.168.254.29
dtmfmode=rfc2833
context=pbx_config
encryption=no
disallow=all
transport=tls
[200]
type=friend
secret=200
host=dynamic
defaultip=192.168.254.132
dtmfmode=rfc2833
context=pbx_config
encryption=no
transport=tls
disallow=all
context=pbx_config

extensions.conf
[general]
static=yes
tlsenable=yes
writeprotect=no
cleanglobalvars=no
[globals]
CONSOLE=console/dsp
IAXINFO=guest
TRUNK=DAHDI/G2
TRUNKMSD=1
[pbx_config]
exten => 100,1,Set(CHANNEL(secure_bridge_signaling)=1)
exten => 100,2,Set(_SIPSRTP=1)
exten => 100,3,Set(_SIPSRTP_CRYPTO=enable)
exten => 100,n,Dial(SIP/100,20)
exten => 100,n,Hangup()

exten => 200,1,Set(CHANNEL(secure_bridge_signaling)=1)
exten => 200,2,Set(_SIPSRTP=1)
exten => 200,3,Set(_SIPSRTP_CRYPTO=enable)
exten => 200,n,Dial(SIP/200,20)
exten => 200,n,Hangup()

please

Looks like the phone insisted on encryption, but you have disabled it.

what should i do ?? where is disabled ?

encryption=no