Many SIDs are vectored departures, they dont have any waypoints, instead they have instructions on the departure chart. Usually they say something like "Fly heading XXX, climb to XXXXft, expect vectors to the first waypoint within xx minutes.". Its obviously critical that you read the chart for the exact instruction when you fly this departure. BTW, its critical for ANY departure / arrival / approach you fly. Always download and read the chart and make sure that you understand everything before you attempt to fly it. After you have entered it into your FMC doublecheck all the waypoints to make sure that they have been entered correctly, and that any altitude / speed constraints have been entered correctly as well. Unfortunately the navigraph navdata isnt very accurate, and often contains incorrect data. Very often.

As for your STAR issue, it would be a lot easier to troubleshoot if you told us your exact route and which STAR you are trying to insert