Not a QIF File???

[JUNIPER]

   I downloaded and imported my first QIF file from Washington Mutual 
Bank with no problem, but when I tried the same thing with my credit 
card, downloading the file BankOne.QIF, when I tried to import it I got 
a message that it was apparently not a QIF file. Bank One said it was, 
and the file downloaded had the QIF extension. Any suggestions? I 
repeated the whole process twice to make sure I hadn't made a mistake. 
(Gnu 1.8.9).
    Steve J