Problem in Indirect activity allocation ( KSCB)

Hi!

I am getting the error while executing kscb like below:

Cycle OSVIUSTES2, start date 20110301, does not include any senders.

No valid sender entries were found.

Message no. GA710

I have maintained planning for sender cost centre & activity ype (KP06).

properly given sender cost centre /activity type and receiver cost center/activity ype in cycle ( KSC7).

sender activity type category is 3 ( manual entry, indirect),, receiver activity type category is 1 ( manual entry, manual allocation).

can any one suggest where could be wrong.

regs,

ramesh