modem problems

Opening device ‘/dev/ser1’
Initializing modem
ATZ

ok
ATM1

ok
Dialing 169…
ATDT169


connect 38400
Link Established
Negotiating PPP connection
pppd[585765-1]: pppd 2.3.5 started by qnx, uid 100
pppd Started
pppd[585765-1]: Using interface ppp0
pppd[585765-1]: Connect: ppp0 <–> /dev/ser1
pppd[585765-1]: No response to PAP authenticate-requests
authentication failed
pppd[585765-1]: Connection terminated.
Connection Terminated
PPPD connection closed

???