Writing .txt file in SD Card - DE2

There's something strange when I try to read from my sd_card.

I just wanna to see the contents in hexadecimal. Here's the code:

short handler = alt_up_sd_card_fopen(temp, false);
printf("\n\n");
if(handler >= 0)
{
    short read;
    while ((read = alt_up_sd_card_read(handler)) != -1)
    {
         printf("%02x ", read);
    }
}

And here are the first results printed on screen:

http://i44.tinypic.com/1551mo8.png

And the file contents seen on a hexadecimal editor:

http://i41.tinypic.com/ezvib.png

Note that the first 4 bytes of the file is repeated 8 times on the code, and the "f9 00 f7 00" part of the file is never read using the code. Strange :cry: