Server Utilities :: Sqlload - 2nd File With Updating Information?

I'm an absolut Oracle beginner and have problems with loading csv files into an Oracle DB. I get 2 files in the morning, the first one has provisionally information like that:

03.11.2011;BFS;03:00:00;00:29:25;0,00572090;0,22408220;56,71504000;
03.11.2011;BFS;03:30:28;00:30:29;0,00676938;0,29812120;55,06820000;
03.11.2011;BFS;04:04:56;00:28:54;0,00315933;0,15332050;61,68312000;
03.11.2011;BFS;04:33:50;00:59:33;0,00093421;0,04295300;59,57108000;

I load them with sqlload into my table. Table keys are the frist three fields. Now in the second file there are updates in the numbers, f.e. like that:

03.11.2011;BFS;03:00:00;00:27:25;0,00572090;0,22408220;56,71504000;
03.11.2011;BFS;03:30:28;00:31:29;0,00676938;0,29812120;55,06820000;
03.11.2011;BFS;04:04:56;00:29:54;0,00315933;0,15332050;61,68312000;
03.11.2011;BFS;04:33:50;00:60:33;0,00093421;0,04295300;59,57108000;

I can't load the with sqlload, because the program says, the key already exists. My control file looks like that:

load data
infile 'example.csv'
badfile 'example.bad'
append
into table mf_sendung

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