Instantiating same class from java or rpg program

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Hi all,
We have data in a file stored in a binary capable VARCHAR field (CCSID 65535). 
This is ASCII data compressed with a GZIP in java.
If I retrieve and unzip this data in java program it works just fine.

When I try to do the same thing in RPG it gives me an error Message . . . . :

 Java exception received when calling Java method.
 Cause . . . . . :   RPG procedure UNZIPSTR in program UNZIPSTR/OLEG received
  Java exception "java.io.IOException: Not in GZIP format" when calling method
  "<ini" with signature "" in class "java.util.zip.GZIPInputStream".


H THREAD(*SERIALIZE)
H OPTION(*SRCSTMT: *NODEBUGIO)
 *
D parmString              S           9957     VARYING
D stream                      S                  O   Class(*JAVA:
D                                                            
'java.util.zip.GZIPInputStream')
D makeStream      PR          O   ExtProc(*JAVA:
D                                             'java.io.ByteArrayInputStream':
D                                             *Constructor)
D                               10000   CONST VARYING

 * Create GZip input stream
D makeGZStream    PR              O   ExtProc(*JAVA:
D                                                    
'java.util.zip.GZIPInputStream':
D                                                    *Constructor)
D                                                O   CLASS(*JAVA:
D                                                    'java.io.InputStream')
D                                                    CONST



C     *ENTRY        PLIST
C                           PARM                    parmString
 *
 /Free
    stream      = makeGZStream(makeStream(parmString));

// the rest of the code.......
   *InLr        = *On;
 /End-Free

Can somebody tell me what I'm doing wrong?








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