Please install all file for the Developer Express V3. Step 1.) Developer Express V3\Developer Express V3 Step 2.) Developer Express V3\V3 Patch 1 Developer Express V3 Grid 3.0 0200-CEFB-153D6305-038616 Editor 3.0 0202-CEFB-4E0EC305-038616 V3 Patch 1 XtraGrid 3.0.1 VS.NET 7 23983042 0200-CEFB-153