UPDATE not working when in use with AccessDataSource vb asp.net

[thepunisher]

I am having problems using an UPDATE command in my asp.net project. The project allows a user to log in via a login page which matches the username and password to a record in the database and saves the username as a cookie. I then have a settings page which I want to allow a user to edit their account details but when I use the UPDATE function the query is executed without any errors but the update doesn't occur. I am using an AccessDataSource and an UpdateCommand hopefully someone can find a problem with my code and steer my in the correct direction.Thanks in advance \[code\]Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Dim sqlcmd As String sqlcmd = "SELECT FirstName, SecondName, UserName, DOB, Password FROM UserTable WHERE UserName = '" & Request.Cookies("UserInfo")("userName") & "'" AccessDataSource1.SelectCommand = sqlcmd If (Not Page.IsPostBack) Then Dim sqlcmd2 As String sqlcmd2 = "UPDATE [UserTable] SET [FirstName] = ?, [SecondName] = ?, [UserName] = ?, [DOB] = ?, [Password] = ? WHERE [UserID] = ? AND ISNULL (([FirstName] = ?) OR ([FirstName] IS NULL AND ? IS NULL)) AND (([SecondName] = ?) OR ([SecondName] IS NULL AND ? IS NULL)) AND (([UserName] = ?) OR ([UserName] IS NULL AND ? IS NULL)) AND (([DOB] = ?) OR ([DOB] IS NULL AND ? IS NULL)) AND (([Password] = ?) OR ([Password] IS NULL AND ? IS NULL))" AccessDataSource1.UpdateCommand = sqlcmd2 End IfEnd Sub\[/code\]\[code\]<form id="webform" runat="server"> <div id="content"> <asp:AccessDataSource ID="AccessDataSource1" DataSourceMode = "DataSet" runat="server" ConflictDetection="CompareAllValues" DataFile="~/Database.mdb" OldValuesParameterFormatString="original_{0}" UpdateCommand = "UPDATE [UserTable] SET [FirstName] = ?, [SecondName] = ?, [UserName] = ?, [DOB] = ?, [Password] = ? WHERE [UserID] = ? AND ISNULL (([FirstName] = ?) OR ([FirstName] IS NULL AND ? IS NULL)) AND (([SecondName] = ?) OR ([SecondName] IS NULL AND ? IS NULL)) AND (([UserName] = ?) OR ([UserName] IS NULL AND ? IS NULL)) AND (([DOB] = ?) OR ([DOB] IS NULL AND ? IS NULL)) AND (([Password] = ?) OR ([Password] IS NULL AND ? IS NULL))"> <UpdateParameters> <asparameter Name="UserID" Type="Int32" /> <asparameter Name="FirstName" Type="String" /> <asparameter Name="SecondName" Type="String" /> <asparameter Name="UserName" Type="String" /> <asparameter Name="DOB" Type="String" /> <asparameter Name="Password" Type="String" /> <asparameter Name="original_UserID" Type="Int32" /> <asparameter Name="original_FirstName" Type="String" /> <asparameter Name="original_FirstName" Type="String" /> <asparameter Name="original_SecondName" Type="String" /> <asparameter Name="original_SecondName" Type="String" /> <asparameter Name="original_UserName" Type="String" /> <asparameter Name="original_UserName" Type="String" /> <asparameter Name="original_DOB" Type="String" /> <asparameter Name="original_DOB" Type="String" /> <asparameter Name="original_Password" Type="String" /> <asparameter Name="original_Password" Type="String" /> </UpdateParameters> </asp:AccessDataSource> <asp:GridView ID="GridView1" runat="server" DataSourceID="AccessDataSource1"> <Columns> <asp:CommandField ShowEditButton="True" /> </Columns> </asp:GridView><div></div></div></form>\[/code\]Sorry if it is all a bit messy but this is my first post and I'm not entirely sure what I'm doing.