Yes, the NT Scheduler runs under the SYSTEM account by default which does not have network access by default. I recommend to upgrade to the new Task Scheduler which enables you to run a specific task under any arbitrary user ID. You can also remotely schedule tasks with the ScheduleTask UDF.
Alternatively, you can run the NT Scheduler under a regular user acount, e.g. Administrator, by changing the startup parameters for the NT Scheduler service. This would also enable your scheudled scripts to access network resources although I do see it as a security risk to have the NT Scheduler service run under anything else than the SYSTEM account.
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There are two types of vessels, submarines and targets.