Windows XP and Server 2003 Legacy Agent cannot use remote control.
After the legacy agent is installed, LANDESK Remote Control Service is not installed. Check the agent install log, there is an error related to missing file called normaliz.dll.
On the affected XP/2003, navigate to C:\Windows\System32, check if there is a file called "normaliz.dll". If not, copy and paste the attached normaliz.dll to that folder and rerun the legacy agent installer.