some problems in mounting usb

[lina <lina.lastname@gmail.com>]

Hi,

there is a usb stick,

1] mount via command line

# mount /dev/sdb1 /mnt/try

when I tried to mount as:

:/mnt/try# ls -lrt *.pdf
-rwxr-xr-x 1 root root 1827158 Jun 18 06:29 PIIS0006349512003256.pdf

it showed me as x x x

# chmod -x PIIS0006349512003256.pdf

# ls -lrt PIIS0006349512003256.pdf
-rwxr-xr-x 1 root root 1827158 Jun 18 06:29 PIIS0006349512003256.pdf


it still x x x

2] mount via click its icon,

it showed me normal.

My question is that, was the way I used to mount via command wrong?

Thanks with best regards,