Windows shared folder access issue

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http://serverfault.com – I have a file server. It has user Jes with full administrative privileges. Server has shared readonly folder "publish". Everyone can read from it. User Jes can do with it everything. Password protected sharing on server is off. I'm try to access shared folder "Publish" on server and I receive message: "access denied". Solution that I use is to "map network device" to folder "Publish" with Jes credentials. Sometimes it work, but sometimes I need about 10 times reboot to make it work! This is a very furious. I'm just want to normal access server shared folder with Jes credentials. How can I (HowTos)