total negative float

Dear All,

My name is faizi imam and i am working on revising a beseline schedule to claim for EOT.After revising the schedule i got the new project completion date in the summary but i am not getting total negative float,instead i am getting total float as zero in the summary.

Could anyone please suggest me that how get the TOTAL NEGATIVE FLOAT in the summary so that i can claim that much project delays.

Immediate reply would be appreciated.

Thanks in advance.