Typecasting can be a bitch for an actor. However, it's just as bad for the viewer when they're unable to be sucked into the story because they can't believe the main character exists, even in those hour and a half. It's tough enough trying to believe a new character of Radcliffe, but it's even harder when there's so many things that reminds me of Harry Potter. Radcliffe's character is still down in the dumps after his wife passed away a few years ago. That's pretty similar to Harry's issues with his deceased parents. Kipps' son never knew his own mother, pretty similar to Harry as well. Early on, Har...err Kipps must go on a train trip to go where he needs to go. That's just like Harry Potter as well. Once there, he has to go to an old house in the middle of nowhere. Once again, similar to Hogwarts. Going up the steps in that large house, he's surrounded by paintings of all sizes. Just like at Hogwarts. There's even a point where Kipps runs into a trio of kids - 2 boys (One redheaded) and a girl. Well ****. I mean hell, Kipps' closest friend in the movie played Aberforth Dumbledore! Throw in a bunch of little mysteries and ghosts that will remind of a lot of Dementors and it becomes really difficult seeing Radcliffe as someone other than Harry. Without being able to believe in Kipps for 90 minutes, you don't care about his character or the entire movie.
While this has nothing to do with Radcliff's past as Harry Potter, but he's too young for the role of Kipps. Granted, Kipps is supposed to be young, but I don't believe he has a four year old son. Shave all that little five o'clock shadow and Radcliff still looks like a teen. Someone older would have been a better choice, not to mention you wouldn't have the Harry Potter problem.