By default standard user can’t burn cd/dvd on a remote desktop session. You can modify this behavior changing a GPO.
Run gpedit.msc with an admin account.
Browse to “Computer Configuration/Administrative Templates/System/Removable Storage Access” and change “All Removable Storage: Allow direct access in remote sessions” to Enabled
This setting does not work on Windows 2008 also with “desktop experience” feature installed :-(
For burn on windows 2008 you must login on remote session with an admin account.