VB.NET not deleting records from SQL DB - sql

Question

I'm having some rather annoying issues with an app I'm trying to write.
I have a DB with a small table ("main") that i entered data into manually when i created the table. I can delete one of the 3 rows that I manually inputted, no problem, but if I add a row from the app it doesn't save to the database and I can't delete it.
Additionally, none of the values that I've edited save to the DB. I suspect that these two issues are related and was hoping you could help me figure out what's wrong.
here's the code for the "delete" button:
Private Sub btnSearchDelete_Click(sender As Object, e As EventArgs) Handles btnSearchDelete.Click
Try
Me.MainTableAdapter.Delete(searchIP.Text, searchSubnet.Text, searchVLAN.Text, searchAlive.Checked, searchReserved.Checked, searchUser.Text, searchDate.Text, searchFail.Text)
' updates system message bar for 1 second
Dim tmCurTime As DateTime = Date.Now
Dim wait As Int16 = 1 ' Time in seconds
Do
sysmsg.Text = "Deleted record."
sysmsg.ForeColor = Color.Red
Application.DoEvents()
Loop Until DateDiff(DateInterval.Second, tmCurTime, Date.Now) = wait
sysmsg.Text = ""
Catch ex As Exception
MsgBox("Delete failed!" - ex.Message)
End Try
Ds.AcceptChanges()
Me.MainTableAdapter.Update(Me.Ds.main)
'clears search filter
Me.MainBindingSource.Filter = Nothing
Me.MainTableAdapter.Fill(Me.Ds.main)
grid.Refresh()
End Sub
(grid is referring to the datagridview on the main app page)
i realize my code is probably, um, extremely messy -- I'm super new the development side of things and this is only the 3rd app I've worked on so far.
Any help you could give would be appreciated.
::EDIT::
ok, so this is what MainTableAdapter.Delete() is calling in SQL-speak:
DELETE FROM [dbo].[main] WHERE (([IP] = #Original_IP) AND ((#IsNull_SUBNET = 1 AND [SUBNET] IS NULL) OR ([SUBNET] = #Original_SUBNET)) AND ((#IsNull_VLAN = 1 AND [VLAN] IS NULL) OR ([VLAN] = #Original_VLAN)) AND ((#IsNull_ALIVE = 1 AND [ALIVE] IS NULL) OR ([ALIVE] = #Original_ALIVE)) AND ((#IsNull_RESERVED = 1 AND [RESERVED] IS NULL) OR ([RESERVED] = #Original_RESERVED)) AND ((#IsNull_USR = 1 AND [USR] IS NULL) OR ([USR] = #Original_USR)) AND ((#IsNull_DATE = 1 AND [DATE] IS NULL) OR ([DATE] = #Original_DATE)) AND ((#IsNull_FAIL = 1 AND [FAIL] IS NULL) OR ([FAIL] = #Original_FAIL)))