The ability to use the telnet:// protocol id in a URL has been disabled by default in IE 7.

As the telnet:// is required to access device in the Remote Lab it must be enabled. To enable follow the procedure below:

1. Open the Registry Editor
Click on Start; Select Run;Ttype regedt32

2. Add This key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_TELNET_PROTOCOL

3. Then add this DWORD in the key:
iexplore.exe

4. Set it's value to 0.

5. Close and restart any open IE7s.