Image upload using FileTransfer.Upload to ASP.NET REST API

I am currently trying to implement Android App using Phonegap ionic framework. My requirement is to upload an image from gallery to remote server. To achieve this I implemented ASP.NET REST API to upload image to server. (Let assume my URL to upload: http://XXXX.net/api/Upload). Inside my REST API I implemented UploadController:WebController. I has a Post() method which looks like below.

Server Code:

public string Post()
{
    HttpPostedFile MyFile = HttpContext.Current.Request.Files["recFile"];
    if (MyFile == null)
        return null;
    return Utils.UploadToServer(file);
}

My Android code looks like below:

$scope.UploadPictureEx = function()
{
    var options = new FileUploadOptions();
    options.fileKey="recFile";  
    options.fileName=$scope.emplyeedata.ImageURI.substr($scope.emplyeedata.ImageURI.lastIndexOf('/')+1);
    options.mimeType="image/jpeg";
    var params = new Object();
    params.value1 = "test";
    params.value2 = "param";
    options.params = params;
    options.chunkedMode = false;
    options.httpMethod = "POST";
    options.headers = {
            Connection: "close"
    };
    var ft = new FileTransfer();
    ft.upload($scope.emplyeedata.ImageURI, "http://XXXX.net/api/Upload/", win, fail, options);
}

Thats it. When I execute I always getting error saying Error code = 3. Can any one please let me know how to get this done? Is my approach of implementing Web API is correct? Am I doing some thing wrong? Thanks!!