Hi Fabricio,

Per our conversation two days ago, I have downloaded a sample of the InfiniteScroll grid, and added Plugins -> FilterHeader to it. The filter header row appears without any special tricks required, unlike in our application. However, it does not support filtering, as the back-end code in the sample does not contain any filterheader functionality, nor do I knkow how to implement such quickly since, as already mentioned, I am new to EXT/ExtJs.

Can you provide a sample that shows InfiniteScroll and FilterHeader working together properly with a Sql Backend such as Northwind or AdventureWorks?

The back-end in the sample I downloaded just uses dynamically generated data that I don't believe would work with FilterHeader parameters. 
for (int i = start + 1; i <= start + limit; i++)
        {
            StockQuotation qoute = new StockQuotation()
            {
                Company = "Company " + (desc ? 50000 - i + 1 : i),
                Price = randow.Next(0, 200),
                LastUpdate = now
            };

            data.Add(qoute);
        }
We need to see a proof of function here so that we can get this grid working without the flicker/reload issue we see currently.

Thanks.