Is it possible to upgrade the firmware of Samsung Galaxy Ace-GT-S5830(Android Froyo

[SaGa]

2.2.1 to Gingerbread 2.3.3? I tried to up grade it using Samsung KIES but it shows the following message:
Model Name : GT-S5830.
Current Version - PDA 7 / PHONE : KA3 / CSC: KA 7,
This device version cannot be updated.
Can any body advice - Why this is (I heard that the upgradation is possible for Samsung Galaxy Ace -GT-S5830 )
.

 

[Ian]

Yes. You can do it at a radio shack. Its just something wierd.