File Upload

a!localVariables(
  local!file,
{
  a!fileUploadField(
    label: "File Upload",
    target:cons!fileUploadConstant,
    labelPosition: "ABOVE",
    maxSelections:10,
    validations: {},
    fileNames:"testFile",
    value:local!file,
    saveInto:local!file,
    uploadMethods: "SIGNATURE"
  )
}
)

I tried file upload but the file didn't get upload successfully to the appointed folder? Did i miss any smart service?