Error when running my app on another machine

[nikel]

Hello, I finished my program, it runs fine on my computer. However when I try it on virtual machine (Win7) I'm getting error something like: Invalid value for attachDbfilename. Here's a screenshot:



Here's full error output: https://gist.github.com/nikel/7cf254...aed24d9ee43483

I defined attachdbfilename like this:

private void Form1_Load(object sender, EventArgs e)
{
    SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder();
    builder.DataSource = @"(LocalDB)\MSSQLLocalDB";
    builder.AttachDBFilename = @"|DataDirectory|\database\gazi_db.mdf";
    builder.IntegratedSecurity = true;
    builder.ConnectTimeout = 30;
 
    sqlConnection = new SqlConnection(builder.ConnectionString);
    ...

How can I fix this?