Receipt Batch is not allowing the Decimal Values in the Control Amount

Hi,

    I have one problem while creating the Receipt Batch.

while we are creating the Batch for the Receipt in the Receivables, we will enter the Batch Source,Batch Number,Batch date,GL date,Deposit date,Control count and Control Amount.

When i'm entering the Amount with the decimal values(945687.23) in the Control amount it is not allowing us. with out decimal values it is working fine.

At the bottom of the page it is showing 

FRM-40209:Field must be of form FM999G999G999G999G999G999G999G999G999G990.

Please let me know how can i enter the Control amount with the decimal values