error in copy table from file

hi
i'm using postgreSQL 7.3 b1.
when i try to populate my tables with the files that contain all the
data, i have some troblues:
for example, my table has the following fields:
-date (date)
-id_street (int2)
-flux_h_0_1 (float8)
-flux_h_1_2 (float8)
.
.
.
-flux_h_23_0 (float8)

the input file has semicolon as delimiters
and it't like this
2000-01-01;25;325.236;-0.123; and so on ;1.2
2000-01-01;26;323.45;-1.23; 1.66

if i execute the command

copy table from 'path/file' using delimiters ';'
it returns the following:

'RROR: copy: line 1, Bad float8 input format '-0.123

i can't understand why it's saying it's wrong!!!!
or another error in importing other tables can be:

": can't parse "ne 1, pg_atoi: error in "125

and 125 is the last number of a row.

what can i do to solve this problem?
thanx in advance for your help

massimo