Searching and Filtering a GridView

[lidadil]

Hello Everyone,
i'm having a gridview wich list clients details. i have setup a search text box and a dropdownlist for filtering. Everything is working except when i try to navigate the next page....i'm getting the filter results and not the search ones....i have created a Hidden control and store the search value... i'm still having problem with this.
Anyone have a solution or run into similar situation?

code snapshot:

Protected Sub submit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles submit.Click

        If ddlVenue.SelectedValue <> "" Then
            Hidden.Value = txtSearch.Text
            LeaderBrd.DataSource = GetClients(Trim(Hidden.Value), "NAME")
            LeaderBrd.DataBind()
        End If
    End Sub


    Protected Sub ddlVenue_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ddlVenue.SelectedIndexChanged
        If (ddlVenue.SelectedValue <> "") Then
            txtSearch.Enabled = True
            submit.Enabled = True
        Else
            txtSearch.Enabled = False
            submit.Enabled = False
        End If
     Hidden.Value = "" 
        LeaderBrd.DataSource = GetClients(ddlVenue.SelectedValue, "VENUE")
        LeaderBrd.DataBind()


    End Sub

Cheers