Problem with querystringparameter

Hi, I'm having problems with the querystring parameter in a SQLDataSource, I think the SelectCommand is not getting the value of the Querystringparameter, here is the code:

<asp:SqlDataSourceID="SqlDataSource1"

runat="server"ConnectionString="<%$ ConnectionStrings:ConnectionString %>"

ProviderName="<%$ ConnectionStrings:ConnectionString.ProviderName %>"

SelectCommand="SELECT cedula,nombre,direccion FROM clientes WHERE nombre LIKE '%' + @.nombre + '%'">

<SelectParameters><asp:QueryStringParameterName="Nombre"QueryStringField="Nombre"/></SelectParameters></asp:SqlDataSource>

I've tried many things like...

"SELECT cedula,nombre,direccion FROM clientes WHERE nombre LIKE @.nombre"

"SELECT cedula,nombre,direccion FROM clientes WHERE nombre LIKE '%' & @.nombre & '%'"

"SELECT cedula,nombre,direccion FROM clientes WHERE nombre LIKE '%' + @.nombre + '%'"

And nothing work, where's the problem?, I send the value of the SelectCommand of the DataSource and the @.name is not replaced by any value.

Use

"SELECT cedula,nombre,direccion FROM clientes WHERE nombre LIKE @.nombre"

and set the value of @.nombre as

@.nombre = '%' + yourValue + '%'

|||The third option should work.