Web Forms :: How To Insert A Feedback

i have this page called rateuser.aspx. User A logs in and can go to this page to rate&feedback any user. This is my code.

Protected Sub submit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles submit.Click
Dim connectionString As String = ConfigurationManager.ConnectionStrings("feedbackratingConnectionString").ConnectionString
Dim connection As SqlConnection = New SqlConnection(connectionString)
connection.Open()
Dim sql As String = "INSERT INTO feedbackuser(feedbacktitle,feedback,date) VALUES(@feedbacktitle,@feedback,@date);"
Dim command As SqlCommand = New SqlCommand(sql, connection)......

the first insert is to insert the feedback data into the feedback table. the 2nd insert is to insert rating data into the rating table. the 3rd insert is to take the feedbackuserID and the ratinguserID and insert it to the feedbackratinguser table (the "toMemberID" is taken from a dropdownlist and the "fromMemberID" is when i session the logged in user.) the "toMemberID" is controlled by dropdownlist where the value is in MemberID but data displayed is username. I am unable to insert the 3rd insert. The error line was "Dim reader3 As SqlDataReader = command.ExecuteReader()" and the error is "ExecuteReader requires an open and available Connection. The connection's current state is closed." how do i solve this error? the executereader is in a open connection already.