adsl usb modem执行cxstart.sh后的错误

东写西读

[root@hg /]# cxstart.sh
>;>;>; Inits Conexant AccessRunner <<<

>;>;>; Loading firmware...
Conexant AccessRunner microcode upload program. 24/6/2003
Josep Comas <jcomas@gna.es>;
Pascal Boucher <bcrp17@tiscali.fr>;
Pawel Konieczny <konieczp@users.sourceforge.net>;

I found ADSL modem with VendorID = 0572 & ProductID = cb00
Loading and sending /usr/sbin/cxfirm4.bin...
Firmware is sent!
Setting configuration...
Waiting ADSL line is up (until 90 seconds)...
..........
ADSL line is up (Downstream 1088 Kbits/s, Upstream 576 Kbits/s)
>;>;>; Loading driver...
Launching driver in normal mode...
Using /lib/modules/2.4.20-8/kernel/drivers/usb/cxacru.o

/usr/sbin/cxload.sh successful
Setting RFC1483/2684 routed...
>;>;>; Setting RFC1483/2684 routed <<<

>;>;>; Loading atmarpd...

>;>;>; Activating interface...
SIOCSIFNETMASK: 无法指定被请求的地址

>;>;>; Creating PVC...
usage: /usr/local/sbin/atmarp -a
       /usr/local/sbin/atmarp -c [[atm]N]
       /usr/local/sbin/atmarp -q ip_addr [qos qos_spec] [sndbuf bytes]
       /usr/local/sbin/atmarp -s ip_addr [itf.]vpi.vci [pcr value] [qos spec] [sndbuf bytes]
         [temp] [pub] [null]
       /usr/local/sbin/atmarp -s ip_addr atm_addr [pcr value] [qos spec] [sndbuf bytes] [temp]
         [pub] [arpsrv]
       /usr/local/sbin/atmarp -d ip_addr [arpsrv]
       /usr/local/sbin/atmarp -V

上在那个"无法指定被请求的地址"和"VC"是什么意思呢？还要设置哪些地方才行，现在不能上网，用adsl-setup建立连接后执行adsl-start什么反应都没有，我该怎么办？(系统是RH9，用pppoe拨号)望不惜赐教。