Import IIF Invoices

Hi,
we trying to import Invoices using IIF files.
W've problems importing the invoice AMOUNT

I'm using a Windows 7 PC with DUTCH environment settings!

The documentation speaks about formatting the DATE field as follow:
"The date of the transaction. The date is always in MM/DD/YY format. For example, 1/30/94"
Our import only works when I make the format "dd-MM-yyyy" (ex. 28-01-2014)

for the amount is said: "(Required) The distribution amount. Credit amounts are negative"

When we give 11.00 $ Quickbooks give 1100 $ (decimals aren't accepted!)
When we give 11,00 $ (comma as decimal separator) Quickbooks give "Number is larger then the maximum"


How can we solve this problem?
thnx