Problem With MasterDetailed Application

Hi.......Every One.

 

i create simple Masterdetail Application with 2 view Controllers FirstVC & SecondVC.

after i run this FirstVC will be placed & set as a root view ontroller  & add to navigationController aslo

 

at the time of run this application firstVC will shown with on navigationButton name Next.

 

when i click on Next button & i got an error like.......

2013-03-14 14:55:00.797 MasterDetailAppdemo[1211:11303] -[FirstViewController nextScreen:]: unrecognized selector sent to instance 0x75624c0

2013-03-14 14:55:00.799 MasterDetailAppdemo[1211:11303] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[FirstViewController nextScreen:]: unrecognized selector sent to instance 0x75624c0'

*** First throw call stack:

(0x1c95012 0x10d2e7e 0x1d204bd 0x1c84bbc 0x1c8494e 0x10e6705 0x1a2c0 0x256a64 0x10e6705 0x1a2c0 0x1a258 0xdb021 0xdb57f 0xda6e8 0x49cef 0x49f02 0x27d4a 0x19698 0x1bf0df9 0x1bf0ad0 0x1c0abf5 0x1c0a962 0x1c3bbb6 0x1c3af44 0x1c3ae1b 0x1bef7e3 0x1bef668 0x16ffc 0x2512 0x2445 0x1)

libc++abi.dylib: terminate called throwing an exception

 

 

Please help me.

Thanks Inadvance:)

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