DataSource Controls :: Change SelectParameter To Accept Datetime Sql Type?

If I ran my sproc from query analyzer, I get the correct results(data is filtered by datetime), i.e:

exec Uds.Dashboard_GetJobs '9/20/2010 11:01:23 PM'

However, if I ran it from the Asp.Net page, (ALL records are showed). Looking at the SQL Profiler I see the following call:

exec sp_executesql N'exec Uds.Dashboard_GetJobs',N'@date nvarchar(21)',@date=N'9/20/2010 11:01:23 PM'

Running both statements above in the query analyzer it WILL return me different results. Why? Someone mentioned that it looks like I don't have correct data type specified for SQLParameter in .Net application. I was asked to create something like:

cmd.Parameters.Add("@Date",SqlDbType.DateTime).Value =

Well, my code in the asp.net is in this form:

<asp:SqlDataSource ID="sourceRealtimeLogging" runat="server"
ConnectionString="<%$ ConnectionStrings:UctConnectionString %>"
SelectCommand="exec Uds.Dashboard_GetJobs">
<SelectParameters>
<asp:ControlParameter ControlID="UpdatedTimeUTC" Name="date" PropertyName="Text" />
</SelectParameters>
</asp:SqlDataSource>

So I guess I am passing a string to SQL, not a datetime type. How do I fix this? Not even sure if this is the cause of my issue but worth a try.