Data Insert Via SQL Express Using VB Issue

I've been doing a lot of research lately to determine the most secure way to issue an insert statement to insert my data into my SQL database.  I'm coding this following using Visual Basic:

 Protected Sub submitButton_Click(ByVal sender As Object, ByVal e As System.EventArgs)

Dim strConn As String = "server=.SQLEXPRESS;database=C:SJ-siteSJApp_DataSJDb.mdf; User Id=user; password=password"
Dim MyQuery As String = "Insert into sjTable (PostID, Category, TitleofPost, Description, Price, Loc, ContactInfo, DatePosted, Disclaimer) Values (@Category, @TitleofPost, @Description, @Price, @Loc, @ContactInfo, @DatePosted)"
Dim MyConn As New Data.SqlClient.SqlConnection(strConn)
Dim cmd As New Data.SqlClient.SqlCommand(MyQuery, MyConn)
Dim curDate As String
On Error Resume Next

MyConn.Open()
If Err.Number <> 0 Then
MsgBox("There was an error connecting to the database.", MsgBoxStyle.OkOnly)
Err.Number = 0
End If

curDate = Now()
With cmd.Parameters
.Add(New System.Data.SqlClient.SqlParameter("@Category", categoryDropDown.Text))
.Add(New System.Data.SqlClient.SqlParameter("@TiteofPost", titleTextbox.Text))
.Add(New System.Data.SqlClient.SqlParameter("@Description", descriptionTextbox.Text))
.Add(New System.Data.SqlClient.SqlParameter("@Price", priceTextbox.Text))
.Add(New System.Data.SqlClient.SqlParameter("@Loc", locationTextbox.Text))
.Add(New System.Data.SqlClient.SqlParameter("@ContactInfo", contactTextbox.Text))
.Add(New System.Data.SqlClient.SqlParameter("@DatePosted", curDate))
End With
If Err.Number <> 0 Then
MsgBox("There was an error inserting the data into the database.", MsgBoxStyle.OkOnly)
Err.Number = 0
End If

MyConn.Close()
If Err.Number <> 0 Then
MsgBox("There was an erro closing the database connection.", MsgBoxStyle.OkOnly)
Err.Number = 0
End If
Server.Transfer("submitted.aspx")


End Sub The code gives no errors, it directs me straight to the
submitted.aspx page but when I query the database it is not inserting
any data into my database.  .

My Error log shows the following:
2006-06-27 12:14:16.68 spid51      Starting up database 'C:SJ-SITESJAPP_DATASJDB.MDF'.
2006-06-27 12:14:26.93 Logon       Error: 17828, Severity: 20, State: 3.
2006-06-27 12:14:26.93 Logon       The prelogin packet used to open the connection is structurally invalid; the connection has been closed. Please contact the vendor of the client library. [CLIENT: <local machine>]

I am able to log into the database using my account via SQL Server Management Studio Express.  I've been all over the forums and google looking for a solution but everything I've been trying to mock up from other people's code hasn't helped.  Thanks in advance for your assistance