The CD burning feature in Windows Vista is buggy and annoying, you should disable it and use 3rd party software such as Nero.
1. Launch registry editor (Start Menu > Run > regedit.exe).
2. Browse to HKEY_LOCAL_USER\Software\Microsoft\Windows\Current Version\Explorer\CD Burning\Drives.
3. Select the correct Volume subkey.
4. Find and modify the IsImapiDataBurnSupported DWORD to 0.
5. Close the registry editor.