Process 访问权限

刚做了一个压缩文件的程序,在本机上测试可以压缩,但压缩服务器上的共享文件时说我没有权限读取文件和创建压缩包,网上搜了哈,说的最多的 net use 但不知道咋用 呵呵 求解决 private void button1_Click(object sender, EventArgs e)
        {
            //要压缩的文件路径
            string zipaaa =@"E:\测试\cslsx\120714-8E-cover";
            //压缩后的文件路径
            string upzip = @"E:\测试\压缩";
            button1.Enabled = false;
            string appDir = AppDomain.CurrentDomain.SetupInformation.ApplicationBase.Replace("/", "\\");
            string rarpath = appDir + "Rar.exe";  //Rar.exe 路径            string rarfile = upzip + "\\ " + zipaaa.Substring(zipaaa.LastIndexOf('\\') + 1) + ".rar";  //压缩包名称  
            System.IO.DirectoryInfo[] di = new System.IO.DirectoryInfo(zipaaa).GetDirectories();
            Process proc = new Process();
            foreach (System.IO.DirectoryInfo item in di)
            {
                ProcessStartInfo pinfo = new ProcessStartInfo
                {
                    FileName = rarpath,
                    Arguments = " a -r -rr10% -ilog" + appDir + "\\err.log -inul -y \"" + rarfile + "\" \"" + item.FullName + "\\\" -ep1 -ap" + item,
                    WindowStyle = ProcessWindowStyle.Hidden,
                    WorkingDirectory = appDir,
                    UseShellExecute = false,
                    CreateNoWindow = true,
                    RedirectStandardInput=true,
                    RedirectStandardOutput=true
                   
                };
                proc = new Process { StartInfo = pinfo };
                proc.Start();
                proc.WaitForExit(1000);
            }
            if (proc.ExitCode == 0)
            {
                proc.Close();
                MessageBox.Show("压缩成功 \n");
                button1.Enabled = true;
            }
            else
            {
                proc.Close();
                MessageBox.Show(" 压缩失败 \n");
                button1.Enabled = true;
            }
        }