Invalid File after Downloading from Database using JSP/JDev 10.1.2

Hi, i got a problem when i download a file from my blobColumn in database.
Well, actually i got no problem in reading the file out of database, but when i download this file, there are 3 more bytes then in the original one in Database...
Here's my java-code in the jsp-page i used as "save as" field:
Hashtable ht = Dokument.createDOK(request);
String dateiname = (String)ht.get("Dateiname");
byte[] fileBytes = (byte[])ht.get("Dokument");
ByteArrayOutputStream ba = new ByteArrayOutputStream();
ba.write(fileBytes);
// RESPONSE
response.setContentType("application/octet-stream");
response.setHeader("Content-Disposition","attachment; filename=\"" + dateiname + "\"");
// DOWNLOAD
OutputStream outs = response.getOutputStream();
ba.writeTo(outs);
outs.flush();
outs.close();
}catch(Exception ex){
ex.printStackTrace();
for testing i used a simple text file with 28bytes:
begin----
Test Zeile 1.
Test Zeile 2.
end-------
after downloading this file it looks like:
begin----
Test Zeile 1.
Test Zeile 2.
end-------
There are 3 bytes 0A(hex) at the beginning...
I dont know why.
after closing "outs" i made system.out for checking the amount of bytes in "fileBytes"-Array, and it was correct, just the 28 bytes like in the file from the Database.
But i actually dont get, why there are 3 more bytes at the beginning after downloading it.
The main problem is, some other files like word or excel documents cannt be opened, because of this 3 bytes at the beginning, and they seem to be invalid.
Would be glad if someone can help me, got really stuck and have no idea any more.
Thanks
Sebastian

Dont someone has a solution, or got a similar problem ?
Thought about it could be a bug in the basic java classes of JDev 10.1.2
but i dont really know...
Have no idea left.
Sebastian

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