iDVD 3 90 Minute Option

[Daniel Beck]

I haven't used iDVD in a while. When I imported my movie files, and 
they were longer than 1 hour, I received the message about choosing 
between 90 minutes and 60 minutes. When I clicked the 90 minute button, 
nothing happens, and the 60 minute button remains blue. When after 
trying for a while, I switched to try the 60 minute button, and it also 
did not respond. Any ideas on what's going on?

Daniel