FR server prints only 5 pages

We have an installation problem. We have reinstalled in a clean box twice an the problem persists.

1. Fast report server WORKS FINE when invoked through a URL redirect
for example :
Response.Redirect("http://192.168.1.7:8010/result?report=1.Basic reports/r2.fr3&rec=sbrocco&format=PDF");

2. Fast report DOES NOT WORK and will only print 5 pages when called form a ASP page using your own example code :

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using FastReport;

public partial class _Default : System.Web.UI.Page
{
protected TfrxReportClass frx;
protected System.IO.MemoryStream ms;
protected System.IO.StreamReader sr;
protected IfrxBuiltinExportsEx exports;

protected void Page_Load(object sender, EventArgs e)
{
// Create report object
frx = new TfrxReportClass();

// Load report template
frx.LoadReportFromFile(@C:\Program files\FastReports\FastReport Studio\Reports\1.Basic reports3.Nested groups.fr3);
// Disable message boxes
frx.EngineOptions.SilentMode = frxSilentMode.simSilent;
// Disable progress window
frx.ShowProgress = false;
// Build report
frx.PrepareReport(true);
// Create a memory stream object
ms = new System.IO.MemoryStream();
// Query extended export interface
exports = frx as IfrxBuiltinExportsEx;
// Do export
exports.ExportToHTML(ms, true, true, false, false, true, false);
// Set memory stream position to begin
ms.Position = 0;
// Create tream reader by a memory stream
sr = new System.IO.StreamReader(ms);
// Write result to the user's browser
Response.Write(sr.ReadToEnd());
sr = null;
ms = null;
}
}