Sierra MC7455 problems

[heni wael]

Good day every body

I installed patched drivers (qmi_wwan and usbnet) and i got this

[root at mc7455-1-qpcs-local ~]# qmi-network /dev/cdc-wdm0 start
Loading profile at /etc/qmi-network.conf...
    APN: weXX.vzXXXX
    APN user: unset
    APN password: unset
    qmi-proxy: no
Checking data format with 'qmicli -d /dev/cdc-wdm0 --wda-get-data-format
'...
error: couldn't create client for the 'wda' service: QMI protocol error
(3): 'Internal'
Device link layer protocol not retrieved: WDA unsupported
Starting network with 'qmicli -d /dev/cdc-wdm0
--wds-start-network=apn='weXX.vzwXXXc'  --client-no-release-cid '...
Saving state at /tmp/qmi-network-state-cdc-wdm0... (CID: 35)
Saving state at /tmp/qmi-network-state-cdc-wdm0... (PDH: 4234166XXX)
Network started successfully
but can't get ip address when i run dhclient

[root at mc7455-1-qpcs-local ~]# dhclient -v wwp0s20u8u2i8
Internet Systems Consortium DHCP Client 4.2.5
Copyright 2004-2013 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/wwp0s20u8u2i8/9a:ae:0f:6e:c7:b4
Sending on   LPF/wwp0s20u8u2i8/9a:ae:0f:6e:c7:b4
Sending on   Socket/fallback
DHCPDISCOVER on wwp0s20u8u2i8 to 255.255.255.255 port 67 interval 5
(xid=0x46902b74)
DHCPDISCOVER on wwp0s20u8u2i8 to 255.255.255.255 port 67 interval 5
(xid=0x46902b74)
DHCPDISCOVER on wwp0s20u8u2i8 to 255.255.255.255 port 67 interval 5
(xid=0x46902b74)
DHCPDISCOVER on wwp0s20u8u2i8 to 255.255.255.255 port 67 interval 11
(xid=0x46902b74)
DHCPDISCOVER on wwp0s20u8u2i8 to 255.255.255.255 port 67 interval 19
(xid=0x46902b74)
DHCPDISCOVER on wwp0s20u8u2i8 to 255.255.255.255 port 67 interval 10
(xid=0x46902b74)
DHCPDISCOVER on wwp0s20u8u2i8 to 255.255.255.255 port 67 interval 6
(xid=0x46902b74)
No DHCPOFFERS received.
No working leases in persistent database - sleeping.

and i have libqmi newest version

[root at mc7455-1-qpcs-local ~]# qmicli -V

qmicli 1.16.0
Copyright (C) 2015 Aleksander Morgado
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl-
2.0.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

can any one help me and tell me how to debug problem
Thanks
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