Run process.start() in a network

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C#

file

process

impersonation

Hi all,
I have written a win application that works on a network.
In one of its forms user can browse and select file from local computer and add it to a list, so the application copies these files to a folder in My Network Places that no users can access to it but one that i have created already for my application so i have his username and password.Every things works fine up to here.

In this form user can also open a file by select it and press open button, so the file should open in an application that relates to its extension(for example test.xlsx should open in Excel.exe).I have used

Process.Start()

to do this but for each extension i receive an individual error(for example "Access is denied" for NotePad and "RunTime error" for AdobeReader and "Not enough memory" for Excel).

What is my mistake?

Note : I have used ImpersonatUser to logon that user in my application.

I have used following code to open the file :

Using(WindowsImpersonationContext impersonateUser = LogonMethod())
{
    ProcessStartInfo pInfo = new ProcessStartInfo(filePathWithExtension);
    pInfo.Domain = MyDomainName;
    pInfo.UseShellExecute = false;
    Process.Start(pInfo);
}

Note : My LogonMethod uses LogonUser method of advapi32.dll.