it's my own Application and i am using html editor control it is working fine in windows 7 and windows server 2003 but i can't able to edit html in windows server 2008 r2 is there is any rights or edit.exe issue ? Oh I see ! This forum is for general system administration related discussions on Windows Servers. Your question is more biased towards the coding/development. You might get better support and answers in MSDN forums than here, I would suggest you to create new threads in MSDN forums Visual Studio Developer Center > Visual C# Forum (choose the forums from category as appropriate) http://social.msdn.microsoft.com/Forums/en/category/visualcsharpI do not represent the organisation I work for, all the opinions expressed here are my own. This posting is provided "AS IS" with no warranties or guarantees and confers no rights. - .... .- -. -.- ... --..-- ... .- -. - --- ... ....