"Read Only" file system

[Jim]

Fedora 18 / kde

My Flash Drive has somehow been change to "Read Only" and I cannot 
delete files from it.

The drive is at /run/media/mickey/0A73-237A and the owner is user 
mickey:mickey  in /mickey/0A73-237A the files on this drive are at;
-rw-r--r--.  1 mickey mickey       967 Aug 23 16:15 yumex
-rw-r--r--.  1 mickey mickey      5107 Aug  5 10:55 yum-update

Everytime I try to "rm yumex" I get a ReadOnly file system

How do I change this ??