While Creating cost center Group and Assignment of Spliting Struture to Cost center, Cost centers not picking

Hi all,

i am facing error in creation of cost center group (T code:KSH1) cost centers are showing when i am pressing F4 but not selecting. i over come this problem by OKEON but in the Assignment of cost center to splitting structure(T code : OKEW) here also i am getting same problem i.e. my cost centers are showing when i press F4 but not selecting any one please help me

Regards,

Ram