SQL Loader and Floating Point Numbers

Hi
I have a problem loading floating point numbers using SQL Loader. If the number has more than 8 significant digits SQL Loader rounds the number i.e. 1100000.69 becomes 1100000.7. The CTL file looks as follows
LOAD DATA
INFILE '../data/test.csv' "str X'0A'"
BADFILE '../bad/test.bad'
APPEND
INTO TABLE test
FIELDS TERMINATED BY "," OPTIONALLY ENCLOSED BY '"'
Amount CHAR
and the data file as follows
"100.15 "
"100100.57 "
"1100000.69 "
"-2000000.33"
"-100000.43 "
the table defined as follows
CREATE TABLE test
Amount number(15,4)
) TABLESPACE NNUT050M1;
after loading a select returns the following
100.15
100100.57
1100000.7
-2000000
-100000.4
Thanks in advance
Russell

Actually if you format the field to display as (say) 999,999,999.99, you will see the correct numbers loaded via SQL Loader.
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