Regarding SIPP tls connection with Asterisk

I configured all the setting on Asterisk for activating tls connection . Then i tried to access asterisk server using SIPp command with tls option. then m getting error .

here is the command
sipp -sn uac -d 2 -s 1000 -l 1 -m 1 -max_retrans 1 -t l1 -tls_cert /root/new_certificate.pem -tls_key /root/new_key.pem

Error is Unable to connect a TCP socket.
Use ‘sipp -h’ for details, errno = 111 (Connection refused).

please Help regarding this issue . But i created a service of tls on 5061 port but that service is not listening on Asterisk.

thanks in Adavance.