on iPhone 3GS it is not working

[zghotlawala]

Dear Concerned,
It is working fine on all the devices except the iPhone 3GS devices.
iPhone 3GS iOS version 5.1
It always shows 'The request token for this page is invalid.' While on other devices iPhone 4 or above and iPad 1 or above it is working fine.
Please guide me with possible solution
Thanks & Regards,
Zahur

[zghotlawala]

I tried to add account in twitter using the inbuilt twitter option in 'Settings'; and guess what it is simply poping up user id or password is incorrect.... That's really weird as