Guys

I have a standard grid setup with a load of filters. The filters can be called without a hitch once the form is loaded from various button etc.
However when I attempt to call the filters in page load from a value in a query string I get the following error "This operation requires an Ajax request".

It fails on the set value

    private void SetGroupFilter(Boolean _Clear)
    {
        
        ListFilter _sfGroup = (ListFilter)GridFilters1.Filters[2];
        if (_GroupFilter.Value == "" || _Clear == true)
        {
            _GroupFilter.Clear();
            _sfGroup.SetActive(false);
        }
        else
        {
            // Create the key pair
            string[] _Values = new string[2];
            _Values[0] = _GroupFilter.Value.ToString();
            _Values[1] = _GroupFilter.Value.ToString();

            _sfGroup.SetValue(_Values);
            _sfGroup.SetActive(true);
        }
    }