Why do they keep switching jame bond?

one specific actor can only go so far with a character. They switch them to try and bring new things to the character. Plus the age factor has a lot to do with it. They cannot have 60 year old super agents jumping off a cliff or parachuting into a gun fight. And you won't see too many 20 year old Bond girls hanging out with Grandpa Q

People do get older you know. Do you want to see a 78 year old (Sean Connery) play James Bond?

Several reasons. The actors get too old (Sean Connery, Roger Moore). The audience doesn't like the actor (George Lazenby, Timothy Dalton). The Bond Franchise wants to retool and move in a new direction (Pierce Brosnan out, Daniel Craig in).

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Cause Sean Connerys a bit old to be running round

Because they become to old to play James Bond anymore, and it make it look newer.

coz more sequels/prequels keep toppin up the list and pierce brosnan and sean connery cant keep up with it...

you should read the books my then will you get the picture