req.getPart(""); returning null?

I'm having some trouble getting my image uploaded to my SQL through JDBC. mySQL table is user(email, pass, name, lastname, profilePicture), profilePicture is sat to blob.

When running I get this excpetion:

SEVERE: Servlet.service() for servlet [changeImage] in context with path [/Event] threw exception [org.apache.tomcat.util.http.fileupload.FileUploadBase$InvalidContentTypeException: the request doesn't contain a multipart/form-data or multipart/form-data stream, content type header is null] with root cause org.apache.tomcat.util.http.fileupload.FileUploadBase$InvalidContentTypeException: the request doesn't contain a multipart/form-data or multipart/form-data stream, content type header is null

my form:

<form method="Post" id="changeImage2" enctype="multipart/form-data">
    <input type="file" name="photo"  />
    <input type="button" value="Submit" id="changeImage1">
</form>

my servlet:

@MultipartConfig
public class changeImage extends HttpServlet{

    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {

        resp.setContentType("text/html");  
        PrintWriter out = resp.getWriter();   

        Part filePart = req.getPart("photo");

        Object email = req.getSession().getAttribute("email");
        Object name = req.getSession().getAttribute("name");

        try{

            Class.forName("com.mysql.jdbc.Driver");

            Connection myConn = DriverManager.getConnection("jdbc:mysql://localhost:3306/logindata", "root", "Simple1337_1");

            PreparedStatement ps = myConn.prepareStatement("update user set profilePicture=? where email=? and name=?");

            ps.setBlob(1, filePart.getInputStream());
            ps.setString(2, (String) email);
            ps.setString(3, (String) name);         
            ps.executeUpdate();

            out.println(email);  

        } catch (Exception e){
            e.printStackTrace();
        }
    }
  }