Unable to run compiled files - bash: ./a.out: Permission denied. (I've tried chmod)

I've compiled my C source using `cc test.c`, and it did generate `a.out` file. However when I run it I get this error - ``` bash: ./a.out: Permission denied ``` My source is not in the home directory, it is on different FAT-32 partition, so I've mounted the drive in which the code is using the following command - ``` $ udisks --mount /dev/sda7 --mount-options umask=022 Mounted /org/freedesktop/UDisks/devices/sda7 at /media/48E9-FD53 $ cd /media/48E9-FD53/C ``` Then I compile my code using `cc` I've also tried `gcc`. But still I get the same error. Then I did - `chmod +x a.out`, still the same problem. Also with(`chmod 755 a.out`) and `chmod u+x a.out`. I've also tried compiling and executing the program using `sudo`. I've also tried - `sudo chown sannidhya:sannidhya a.out`. I've tried every thing that I found after googling, still couldn't get it to work. How can I run `.out` file (without moving it to home directory)? Note - I am using Ubuntu 12.04 LTS. But a weird thing here is, even after running `chmod +x a.out`, on running - `ls -l a.out`, I get- ``` -rw-r--r-- 1 ``` also when I check the properties of `a.out`, under Permissions tab, when I check `Allow executing file as program`,the tick appears and quickly disappears.