Each camera model’s raw files must be supported individually and Adobe only updates their currently shipping products for new cameras.
The X-E2, being a new camera, was first supported in ACR 8.3 which is only compatible with CS6 and CC, not CS5.
Upgrading your PS to CS6 or CC or buying Lightroom are probably the best choices to allow native support for your X-E2 raw files.
You can also use the free Adobe DNG Converter 8.3 to create DNGs from your X-E2 raw files, and those DNGs will open in older ACR plug-ins such as ACR 6.x that comes with PS-CS5 but be aware you’ll need to set your conversation options to old enough that your ACR plug-in is newer. The default conversion level is ACR 7.1 which is too new.
The DNG Converter 8.3 is available from:
Thank you for your help, i think would be better to upgrade to cs6 , i tryed to find the upgrade webpage but i could'nt , do you mind if you send the link of the pgrade from cs5 to cs6 , please
Thank you & Best Regards