Welcome, Saangy.
You didn't mention what version of RoboHelp you are using or
what kind of web server you are publishing to. A Windows web server
(IIS)? A UNIX web server? RoboHelp Engine 4? RoboHelp Server 6?
That said, (and not being an IT person) it sounds like a
permissions problem involving your network and not RoboHelp itself.
Just having write/modify/delete permissions is not the only
thing that might cause problems. My guess is that you'll need the
help of your network administrator.
If you'd like to elaborate a bit more, we'll try to help.
john
John Daigle
Adobe Certified RoboHelp and Captivate Instructor
Newport, Oregon