when ever i try to install TeamSpeak i get the following Errors

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Error creating registry key:
HKEY_CLASSES_ROOT\teamspeak
RegCreateKeyEx failed code 5
Access is denied

+++++++++++++++++++++++++++++++++++++++++++
Error creating registry key:
HKEY_CLASSES_ROOT\teamspeak\defaultIcon
RegCreateKeyEx failed code 5
Access is denied

+++++++++++++++++++++++++++++++++++++++++++

Error creating registry key:
HKEY_CLASSES_ROOT\Shell
RegCreateKeyEx failed code 5
Access is denied
+++++++++++++++++++++++++++++++++++++++++++

Error creating registry key:
HKEY_CLASSES_ROOT\Shell\open
RegCreateKeyEx failed code 5
Access is denied

+++++++++++++++++++++++++++++++++++++++++++

Error creating registry key:
HKEY_CLASSES_ROOT\Shell\open\command
RegCreateKeyEx failed code 5
Access is denied

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what am i ment to do?