Connection Still Apperas In SQLServer Entreprise Manager Over Locks / Process ID

Hello,i have a doubt here, after a close the connection, i still can see the last stored procedure active in the LOCKS/PROCESSID in enterprise manager of SQL SERVER.I think i'm closing the connection well

Try

If Me.ID > 0 Then

Dim strSql As String = "SP_CHANGECLASSCONTENTS"

Dim sqlcommand As New SqlCommand(strSql, New SqlConnection(ConnStr))

sqlcommand.CommandType = CommandType.StoredProcedure

sqlcommand.Parameters.Add("@PerformActivation", SqlDbType.Bit).Value = 0

sqlcommand.Parameters.Add("@PerformInactivation", SqlDbType.Bit).Value = 0

sqlcommand.Parameters.Add("@PerformDelete", SqlDbType.Bit).Value = 1

sqlcommand.Parameters.Add("@PerformUndelete", SqlDbType.Bit).Value = 0

sqlcommand.Parameters.Add("@PermanentDelete", SqlDbType.Bit).Value = CBit(PermanentDelete)

sqlcommand.Parameters.Add("@Class_ID", SqlDbType.Int).Value = _id

sqlcommand.Connection.Open()

sqlcommand.ExecuteNonQuery()

sqlcommand.Connection.Close()

Else

Err.Raise(10205, "CLASS", "CLASS ID is empty")

End If

Catch ex As Exception

_err = ex.Message

Return Err.Number

End Try