Resolution always 72 dpi for CMYK JPEG

Bitmap img = CropImage(path, width, height); // my method

//Choose LittleCMS color management engine
img.ColorManagement.ColorManagementEngine = ColorManagementEngine.LittleCms;
//Assign input sRGB profile
img.ColorProfile = ColorProfile.FromSrgb();
if (color != 1)
{
	img.ColorAdjustment.Desaturate();
}

//Assing output CMYK profile for conversion
img.ColorManagement.CmykColorProfile = null; //= new Aurigma.GraphicsMill.ColorProfile(@"d:\Downloads\Coldset_DG26_TIL225_K90_ModGB.icc");
//Convert to CMYK
img.ColorManagement.ConvertToContinuous(ColorSpace.Cmyk, false, img.IsExtended);
img.ColorAdjustment.AutoBrightness();
img.ColorAdjustment.AutoContrast();
img.Save(Path.Combine(imgDest, "cropped\\" + imgName));
img.HorizontalResolution = 300;
img.VerticalResolution = 300;
img.Transforms.Resize(width, height, ResizeMode.Resize, InterpolationMode.HighQuality);
JpegEncoderOptions encOpt = new JpegEncoderOptions(80, true);
img.Save(Path.Combine(imgDest, "resize\\" + imgName), encOpt);
SendToFtp(Path.Combine(imgDest, "resize\\" + imgName), GetFtpDir(title));
img.Dispose();