Default [Q] im not able to Manage my sola Folders from PC via WIFi using ES File Explorer?

hi all

I had follow all these steps trying to manage my xperia folder through wi-fi but i am always getting this msg error anyone can tell me whatsup ?

http://webcazine.com/7363/how-to-man...file-explorer/
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Make . Believe
Sony Xperia Sola
Android Version 4.0.4 Ice Cream Sandwich