It's so great that you share this with us

Hello.Invalid Navigation Error - Hey guys!I'm kinda new to DVDShrink, but all of the dvds I've used have worked--until now. Oddly enough, it's 2 Will Ferrell flicks--Talledega Nights and Stranger than Fiction. When I click "Open Disc" is says, "DVD Shrink encountered an error and cannot continue. Invalid DVD navigation structure."Are these dvds uncopy-able?