about change file mode

[Xavier FreeBSD questions]

Hi tot all,

Why don't change the files mode ?

casa# mount -t msdosfs /dev/da0s1 /mnt/JetFlash\ Transcend\ 1GB/
casa# cd /mnt/JetFlash\ Transcend\ 1GB/
casa# ls -lh
total 21940
-r-xr-xr-x  1 xxavi  wheel    16M 21 mar 00:12 COLOR.pdf
-r-xr-xr-x  1 xxavi  wheel   4,7M 21 mar 01:26 COLOR_1.pdf
-r-xr-xr-x  1 xxavi  wheel   124k 21 mar 02:13 COLOR_2.pdf
-r-xr-xr-x  1 xxavi  wheel    21k 21 mar 01:16 Untitled 1.pdf
-r-xr-xr-x  1 xxavi  wheel   9,3k 22 mar 00:17 Untitled 2.pdf
-r-xr-xr-x  1 xxavi  wheel   124k 21 mar 02:13 kscan_0002.jpeg.pdf
-r-xr-xr-x  1 xxavi  wheel    20k 21 mar 00:12 ocr.txt.pdf
casa# chmod -x *
casa# ls -l
total 21940
-r-xr-xr-x  1 xxavi  wheel  17270757 21 mar 00:12 COLOR.pdf
-r-xr-xr-x  1 xxavi  wheel   4866360 21 mar 01:26 COLOR_1.pdf
-r-xr-xr-x  1 xxavi  wheel    127452 21 mar 02:13 COLOR_2.pdf
-r-xr-xr-x  1 xxavi  wheel     21829 21 mar 01:16 Untitled 1.pdf
-r-xr-xr-x  1 xxavi  wheel      9561 22 mar 00:17 Untitled 2.pdf
-r-xr-xr-x  1 xxavi  wheel    127452 21 mar 02:13 kscan_0002.jpeg.pdf
-r-xr-xr-x  1 xxavi  wheel     20513 21 mar 00:12 ocr.txt.pdf
casa#

Thanks, see you.