Arduino uno + W5100 + SD to load the image jpg

I got this message, even "index.htm" is already on SD card, why is it ??

Initializing SD card...
SUCCESS - SD card initialized.
GET / HTTP/1.1
Host: 192.168.1.90
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive

Extracted filename is: index.htm
File not found!!