What is the problem with the Dodge Challenger?

Rick Kranz is product editor for Automotive News
Maybe someone can explain: What's the issue with the Dodge Challenger?

It's an exceptional, fun-to-drive coupe, but sales are disappointing.

Here at Automotive News we've had stories about the sales race between two other pony cars, the Chevrolet Camaro and Ford Mustang. For the first seven months of this year, the Camaro is the top seller of the trio, with sales of 53,864. Mustang is 6,340 units behind.

The Challenger places a distant third -- 21,361 units sold over seven months. It's a puzzling sales number. Challenger is sharp-looking, handles great and a powerful Hemi can be packed under the hood.

Interestingly, Mustang has two models, a coupe and a convertible, and is running second to Camaro, which is available only as a coupe.

I'm curious: What are the reasons for Challenger's disappointing sales?

I'm looking forward to your comments.