getting "bad init string" when dialing with wvdial

I'm trying to dial-up with my Huawei modem EM680 using wvdial. My modem is found properly on /dev/ttyUSB1 but when I execute wvdial I get this: # wvdial --> WvDial: Internet dialer version 1.61 --> Cannot get information for serial port. --> Initializing modem. --> Sending: ATZ ATZ OK --> Sending: ATQ0 V1 E1 +FCLASS=0 ATQ0 V1 E1 +FCLASS=0 OK --> Sending: AT+CGDCONT=1,"IP","m2mstatic.apn" AT+CGDCONT=1,"IP","m2mstatic.apn" ERROR --> Bad init string. --> Cannot get information for serial port. --> Initializing modem. --> Sending: ATZ ATZ OK --> Sending: ATQ0 V1 E1 +FCLASS=0 ATQ0 V1 E1 +FCLASS=0 OK --> Sending: AT+CGDCONT=1,"IP","m2mstatic.apn" AT+CGDCONT=1,"IP","m2mstatic.apn" ERROR --> Bad init string. --> Cannot get information for serial port. --> Initializing modem. --> Sending: ATZ ATZ OK --> Sending: ATQ0 V1 E1 +FCLASS=0 ATQ0 V1 E1 +FCLASS=0 OK --> Sending: AT+CGDCONT=1,"IP","m2mstatic.apn" AT+CGDCONT=1,"IP","m2mstatic.apn" ERROR --> Bad init string. # Why does it say bad init string.? My /etc/wvdial.conf looks like this: [Dialer Defaults] Init1 = ATZ Init2 = ATQ0 V1 E1 +FCLASS=0 Init3 = AT+CGDCONT=1,"IP","m2mstatic.apn" Stupid Mode = yes Modem Type = Analog Modem ISDN = 0 New PPPD = yes Phone = *99# Modem = /dev/ttyUSB1 Username = ; Password = ; Baud = 9600