Viewstate Compression issues in asp.net

Hi Experts,
I have big porblems in my website,i'm using the compress the viewstate, all the time working well,  but sometime, it will display like this way


<?a id="ctl00_ctl00_ContentPlaceHolder1_ContentPlaceHolder1_LinkButton8" href="javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("ctl00$ctl00$ContentPlaceHolder1$ContentPlaceHolder1$LinkButton8", "", false, "", "../ListPosts.aspx", false, true))">24Hours
Please help me


Here  is my code


internal void Compress()
    {
        HttpContext context = HttpContext.Current;
        HttpRequest request = context.Request;
        string acceptEncoding = request.Headers["Accept-Encoding"];
      ...