Strange Problem ADSL WIC Card - 1721

I have a very strange problem, I have 2x  1721 routers , exact model, when i use adsl wic on one, it works fine, when i use it on the other, it doesnt recognise the ATM interface.

The only difference between the 2 is that one of the 1721 is newer.

Anyone know the technical reason why it doesnt work??
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Check the Flash Memory size of both the Routers

and also the IOS Version
mbavisiAuthor Commented:

I will double check this and will write back, i have a sneeky suspicion its the IOS.
How did it go?

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.