使用C#和asp.net将sql插入到访问数据库中时出现语法错误

cmd.ExecuteNonQuery();

这说

Syntax error in INSERT INTO statement

我认为我的查询应该是有效的,我不明白这个问题,而且我已经工作了好几个小时.这是正确的顺序,并围绕用户放置[]不适合我,将不胜感激.

<%@ Page Language ="C#" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.OleDb" %>   
    <script runat="server">
    protected void Page_Load()
    {

            String username = Request.Form["username"];
            String email = Request.Form["email"];
            String password = Request.Form["password1"];
            var age = Request.Form["age"];
            String country = Request.Form["country"];
            String hobbie = Request.Form["skin"];
            String sql;

            sql = "INSERT INTO Users(UserName,Email,Password,Age,Country,Hobbie) VALUES('" + username + "','" + email + "','" + password + "'," + age + ",'" + country + "','" + skin + "')";

            String Path = Server.MapPath("App_Data/Users.accdb");
            String connStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source="+Path;

            OleDbConnection conn = new OleDbConnection(connStr);
            conn.Open();

            OleDbCommand cmd = new OleDbCommand(sql,conn);
            cmd.ExecuteNonQuery();

            conn.Close();
    }