byte [] FileUpLoad works when local and in debug but not on the test server.

protected void btnAdd_ServerClick(object sender, EventArgs e)
	{
		AttachmentOutYearDepotWorkSpecDB attachmentDB = new AttachmentOutYearDepotWorkSpecDB(Application["ConnectionString"].ToString());
		
		string addAttachmentName; 
		string addFileRefeference;
		string convertAttachmentName;
 
		//Checks to see if a user has browsed to a file
		if (fulAttachment.HasFile)
		{
			try
			{
				
				addAttachmentName = fulAttachment.PostedFile. FileName.ToString();
				addFileRefeference = fulAttachment.PostedFile.FileName;
				convertAttachmentName = System.IO.Path.GetFileName(addAttachmentName);	
				//takes the binary stream from the FileUpLoad control
				byte[] attachment = GetAttachment(addFileRefeference);
				attachmentDB.Template.ModUserID = Convert.ToInt32(Session["UserID"]);
				attachmentDB.Template.TypeID = 9;				
				attachmentDB.Template.ContentType = "application/pdf";
				attachmentDB.Template.FileReference = convertAttachmentName.ToString();
				attachmentDB.Template.Description = "Link to Out Year Depot Work Spec .PDF";
				attachmentDB.Template.Attachment = attachment;
				attachmentDB.AddOutYearDepotWorkSpec();
 
			}
			catch (Exception se)
			{
				throw new AddException(se.Message);
			}
		}
		else
		{
			Response.Write("<script type='text/javascript' language='javascript'>\nalert('Please choose a file to Upload');\n</SCRIPT>");
		}
 
		ClearInputs();
 
 
//Retrives the byte[] from the stream and sets it for the attachment
	public static byte[] GetAttachment(string filePath)
	{
		FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);
		BinaryReader br = new BinaryReader(fs);
 
		byte[] attachment = br.ReadBytes((int)fs.Length);
 
		br.Close();
		fs.Close();
 
		return attachment;
	}