Travel - Salzburg to Lesce Bled

Hi. We are scheduled to travel from Salzburg to Lesce Bled next weekend and the timetable is not showing any direct trains as is mentioned on Man in Seat 61. It looks like we will need to part travel on the OBB bus from

Bischofshofen Bahnhof (Vorplatz) D11.20 Bus SV220 to

Spital-Millstatter See Bahnhof A12.40 

and then pick up train connections to Villach , Jesenice and Lesce. 
 

Can anyone please tell me if the Interail pass is valid on the bus element of this route. Alternatively if any can see a direct or purely train route please let me know.

Thanks

John