W1800r安装optware失败，求指导

fever

刷了bwq518的tomato固件，按各种教程安装optware，结果失败了,过程见下：

root@unknown:/opt# l
drwxr-xr-x    2 root     root         65536 Oct 15 07:33 etc/
-rwxr-xr-x    1 root     root         75831 Oct 15 07:26 ipkg-opt_0.99.163-10_mipsel.ipk*
drwxr-xr-x    2 root     root         65536 Oct 15 07:33 lib/
-rwxr-xr-x    1 root     root          2585 Aug 12 13:12 optware-install.sh*
drwxr-xr-x    2 root     root         65536 Oct 15 07:33 sbin/
drwxr-xr-x    3 root     root         65536 Oct 15 07:47 tmp/
drwxr-xr-x    3 root     root         65536 Oct 15 07:33 usr/
root@unknown:/opt# sh optware-install.sh
Checking system config ...
Using 183.33.176.1 as default gateway.
Using the following nameserver(s):
nameserver 127.0.0.1
Warning: /opt partition not empty!
Installing package uclibc-opt_0.9.28-13_mipsel.ipk ...
--2014-10-15 22:58:31--  http://ipkg.nslu2-linux.org/feed ... .9.28-13_mipsel.ipk
Resolving ipkg.nslu2-linux.org... 140.211.169.161
Connecting to ipkg.nslu2-linux.org|140.211.169.161|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 852163 (832K) [text/plain]
Saving to: '/tmp/uclibc-opt_0.9.28-13_mipsel.ipk'

0% [                                       ] 0           --.-K/s   in 0s

2014-10-15 22:58:31 (0.00 B/s) - Read error at byte 0/852163 (Invalid argument). Retrying.

--2014-10-15 22:58:32--  (try: 2)  http://ipkg.nslu2-linux.org/feed ... .9.28-13_mipsel.ipk
Connecting to ipkg.nslu2-linux.org|140.211.169.161|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 852163 (832K) [text/plain]
Saving to: '/tmp/uclibc-opt_0.9.28-13_mipsel.ipk'

0% [                                       ] 0           --.-K/s   in 0s

2014-10-15 22:58:33 (0.00 B/s) - Read error at byte 0/852163 (Invalid argument). Retrying.


后面的段落会重复几次，只能用ctl+c中断。
使用tt时间不长，对此问题试过重新格式化U盘，手工下载所需文件安装，都不行。
请高手告知问题症结