how to download large file >=16M on G-wan?

how to download large file >=16M on G-wan?

I use G-wan download files from directory 'www' ,it can download the files
size less than 16M,if the files size is 16M, the G-wan is wrong. Os:
debian 7,rhel6.4 dwonload the file size is 80M
,file:0.0.0.0_8080/#0.0.0.0/www/MFC-7340-inst-B2-zh.EXE.this is trace
content:
trace file:
Wed, 14 Aug 2013 02:57:36 GMT: start
Wed, 14 Aug 2013 02:58:00 GMT 12 127.0.0.1
GET /MFC-7340-inst-B2-zh.EXE HTTP/1.1^M
Host: localhost:8080^M
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130806
Firefox/17.0 Iceweasel/17.0.8^M
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8^M
Accept-Language: en-US,en;q=0.5^M
Accept-Encoding: gzip, deflate^M
Connection: keep-alive^M
Cookie:
SESS49960de5880e8c687434170f6476605b=iOQ_BgGEgAWbhB9zA0U5jZbEOXzmu3nkzhyBW00GJGM;
Drupal.tableDrag.showWeight=0; Drupal.toolbar.collapsed=1;
MOIN_SESSION_800_ROOT=8a77c4a58fefc1ad6b6830b5bc51ca680a480bae^M
^M
Wed, 14 Aug 2013 02:58:02 GMT: signal 11: Unknown SIGSEGV problem
source : 128:Kernel
thread : 0/2
state : SEND
client : 127.0.0.1:58472
request : /MFC-7340-inst-B2-zh.EXE
----------------
----------------
Signal : 11:Unknown SIGSEGV problem
Signal src : 128:.
errno : 0
Thread : 0
Code Pointer: 0000004081a8 (module:gwan, function:??, line:0)
Access Address: 000000000000
Registers : EAX=7f85482fd0c0 CS=00000033 EIP=0000004081a8
EFLGS=000000010293
EBX=7f8565501000 SS=6cd00400 ESP=7f856cbfcd30
EBP=7f85482fd0c0
ECX=ffeea9eeb46863d5 DS=6cd00400 ESI=11d59693c9ef4b
FS=00000033
EDX=1156114b9a1e8b ES=6cd00400 EDI=7f85482fd0b0 CS=00000033
Module :Function :Line # PgrmCntr(EIP) RetAddress
FramePtr(EBP)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~