Could not able to run the executable from the USB flash drive only in Ubuntu 10.10

What filesystem do you use on your flash? If it is FAT, maybe the program you run does not have permssion to read. Try to copy it to your hard drive and then run.
Also, how did you change rights? Try to run "chmod +x -R /media/YOUR_FLASH_DRIVE/"

Its FAT filesystem. Its works fine if i run the file from the hard drive or the same USB drive executable works fine in Ubuntu 10.04.
I ran the command as mentioned : chmod +x -R /media/exefile -> The permission is not changing to any of the files which is in the USB.
For testing :
I created a file in the hard disk ( / ) and set the (chmod +x -R) permission which is applied but after i copied the file to the USB drive the permission changed to -rw-r--r-- instead of -rwxr-xr-x .

What executable is it? Is it a *NIX binary or some windows executable?

Its a python script which is executable. Created in linux environment.

then try:

py /path/to/script

and it should run ok

Thanks for your response actionparsnip.
But the source python script has been converted as Unix binary which is executable. The problem is the file permission not changing to executable mode , so it not allows to execute the file. Tried "chmod 777 filename" but its not getting applied.

To reproduce the case:
Just copy any executable file(Any file which has 777 permission) to the USB pen drive and you can find that the executable permission has automatically changes to Read+write mode of the destination file.

A little context might be helpful: the executable is that of a portable application meant to be run from a flash drive. So, though running the executable from the command line would probably work, that's more than the fabled Average User is likely to know how to do.

Guess ubuntu 10.10 auto mounting not allows to change the file/folder permissions or execute the file from the usb drive .

It can be fixed manually by mounting the usb drive as mentioned below.

#1
Create a folder in /media to mount the usb data: > mkdir usb

#2
Identify the USB device which is connected : > fdisk -l
Which shows the usb device like: /dev/sdc1

#3
Now add an entry in /etc/fstab :
/dev/sdc1 /media/usb vfat umask=0222,auto,users,exec 0 0

#4
Save and quit.

#5
> mount /media/usb

Check your files in /media/usb which has executable permission and you can change the permission as wish.

> unmount /media/usb

Still waiting to know the right answer , is it ubuntu 10.10 release doesnt mount USB drive with executable permission due to security restriction or is it a bug !!!