DDS Troubles

[Aerendor]

Hello,

I wanted to change my UI and make it silvery (like Incubi had done in a long past...) especially with the new stuff the add with DoF.
I used Photoshop CS and the DDS plug in from NVidia site.

and for some reason every parts of graphics are surrounded by huge light grey borders.

Any idea on what needs to be done ?
Where am i wrong ? (

Thanks