problem creating pdf document using filestream and storing in DB

I have an application that is creates a PDF and then stores it in a database. On my local machine everything works great, but it fails with the following error when on the production server. The file stream  Line 66 is.

using (FileStream fs = File.Create(@"Eval" + DaRec + ".pdf"))

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My application is a .net 4.5

The error Message

System.UnauthorizedAccessException: Access to the path 'C:\Windows\SysWOW64\inetsrv\Eval1200.pdf' is denied. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize) at System.IO.File.Create(String path) at GeneratePDF.Page_Load(Object sender, EventArgs e) in c:\Projects\appcreate\GeneratePDF.aspx.cs:line 66

Although this error talked about access denied. My server person indicates the error may be towards a machine key issue based on info from the server error logs. He sent me this address based on that error.  

http://blogs.msdn.com/b/tess/archive/2009/09/16/forms-authentication-fails-after-installing-iis-7-5.aspx

Here is my machine key currently in the web config

 <machineKey validationKey="1640985E8BF5DF25E040ED58ADB257AA8BE739C5B789E0FDE1BA08E11D8A1C13AFC0211C5CFC76306F4A860D32B1856B67A868D11C0B0280CB52B6159F5F08DF" decryptionKey="F52FC385309C58D876FCDBB5F0D8DEA581E645CA5513973B0241E6668C678355" validation="SHA1" decryption="AES" compatibilityMode="Framework45" />

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Current code

using (MemoryStream myMemoryStream = new MemoryStream())
                {
                    try
                    {

                        Document myDocument = new Document(PageSize.A1, 10f, 10f, 10f, 0f);
                        PdfWriter myPDFWriter = PdfWriter.GetInstance(myDocument, myMemoryStream);
                        myDocument.Open();
                        WebClient wc = new WebClient();
                        string htmlText = wc.DownloadString("http://Prod40202/appcreate/GeneratePDF/CreatePDF.aspx?pid=" + DaRec);
                        Response.Write(htmlText.Replace("\r", "").Replace("\n", "").Replace("  ", ""));

                        List<IElement> htmlarraylist = HTMLWorker.ParseToList(new StringReader(htmlText), null);

                        for (int k = 0; k < htmlarraylist.Count; k++)
                        {

                            myDocument.Add((IElement)htmlarraylist[k]);
                        }
                        myDocument.Close();
                        byte[] content = myMemoryStream.ToArray();
                        //    document.Close();
                        using (FileStream fs = File.Create(@"Eval" + DaRec + ".pdf"))
                        {

                            fs.Write(content, 0, (int)content.Length);
                            var p5 = ctx1.tblAttachments.SingleOrDefault(u => u.AttachmentID == RecID);
                            if (p5 != null)
                            {
                                p5.DocName = "PayEval" + DaRec + ".pdf";
                                p5.DocType = "pdf";
                                p5.DocByteSize = Convert.ToInt32(fs.Length);
                                p5.DocBinary = content;
                                p5.DateCreated = DateTime.Now;
                                ctx1.SaveChanges();
                                Response.Redirect("OpenAttachment.aspx?pid=" + RecID);

                            }

                        }
                    }
                    catch (Exception ex)
                    {
                        Response.Write(ex.ToString());
                    }
                }

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NickMalloySystems LeadAsked:
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