Password encrypting a PDF . (security lost)

Hello
i am using the following piece of code to password encrypt a PDF
However . when i copy this PDF to another machine. the PDF is not secured
Please help.. this is very important to me.
char *errorBuf;
    DURING
    CString strPassword = "123456789";
    PDDocSetNewCryptHandler (pdDoc,ASAtomFromString("Standard"));
    StdSecurityData securityData = (StdSecurityData)PDDocNewSecurityData(pdDoc);
    securityData->size = sizeof(StdSecurityDataRec);
    securityData->hasUserPW = false;
    securityData->newOwnerPW = false;
    securityData->hasOwnerPW = true;
    securityData->newOwnerPW = true;
    strcpy_s(securityData->ownerPW, strPassword );
    strcpy_s(securityData->userPW, strPassword );
    securityData->perms = pdPermPrint ;
    securityData->keyLength = 16;
    PDDocSetNewSecurityData (pdDoc, (void*)securityData);
    PDDocSetFlags(pdDoc, PDDocRequiresFullSave);
    HANDLER
        ASGetErrorString (ASGetExceptionErrorCode(), errorBuf, 255);
        AVAlertNote (errorBuf);
    END_HANDLER

Did you remember to save the PDF after running this? This only sets it up for being secured - you still need to save it.

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Password encrypting a PDF . (security lost)

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