Commercial Level A340 - runs away at idle

How do I slow down the aircraft which wants to barrel down the tarmac when at idle? I take my foot off the break and she's up to 25 kts before I can get her slowed down and have to keep hitting the break to keep her under control. She's not overpowered (53,000 lbs) which is about right for this size aircraft. My other aircraft don't start to taxi til I give them a little throttle. Any idea how to reign this one in?Thanks