CRM 2011: How to change the currency field limit?

Hello,

I have a field which is currency type. The default range limit in CRM is from 0.0000 to 1,000,000,000.0000. But if I change the range to (0.0000, 1,000,000,000,000.0000), when I save a record, it always pops up message like 'You must enter a number between 0.0000 and 1,000,000,000,000.0000'. Does that mean the range can't be over the limit?

Need your help.

Thanks.