Thanks Doc.

My error, i have the Curve 8530

I did as you suggested, downloaded prevision version. 

• The Blackberry Desktop Software shows  the device software version being 5.0.0.973. 
• when you go to the "?" , "support Resources" , Installed Blackberry Device Software , it show v5.0.0.886 (platform 4.2.0.397).
• On the phone itself it show v5.0.0.973 platform 4.2.0.422

i synch, but the version doesn't change.

how do i force the 5.0.0.866 version to my phone