Has any one used RSA on Gemplus Xpresso Javacards? (JC 2.1.1)

Hello,
i ve been trying to generate an RSA keypair on my Xpresso card, but the applet fails to load... what i try is...
package packJCardDemo1;
import javacard.framework.*;
import javacard.security.*;
public class CardRWV extends Applet {
private static KeyPair keypair;
public static void install(byte[] buffer, short offset, byte length) {
memory = new byte[SIZE_MEMORY];
pin = new OwnerPIN(DEFAULT_PIN_MAX, PIN_SIZE);
pin.update(DEFAULT_PIN, (short)(0), PIN_SIZE);
try {
keypair = new KeyPair( KeyPair.ALG_RSA, KeyBuilder.LENGTH_RSA_512 );
} catch (CryptoException ce) {
if (ce.getReason() == CryptoException.UNINITIALIZED_KEY)
ISOException.throwIt(ISO7816.SW_FILE_FULL);
else if (ce.getReason() == CryptoException.INVALID_INIT)
ISOException.throwIt(ISO7816.SW_FILE_NOT_FOUND);
else if (ce.getReason() == CryptoException.ILLEGAL_USE)
ISOException.throwIt(ISO7816.SW_FILE_INVALID);
else if (ce.getReason() == CryptoException.NO_SUCH_ALGORITHM)
ISOException.throwIt(ISO7816.SW_WRONG_ALG);
else
ISOException.throwIt(ISO7816.SW_RECORD_NOT_FOUND);
new CardRWV().register();
The compile runs ok, but when i try to load the applet into the card it fails (the install method generates an exception). If i put the try-catch in comments my applet loads normally...
Also when is use debug i get these messages indicating that RSA is (should be) implemented...
Checking crypto providers...
"DESede/ECB/NoPadding" feature found in provider: "SunJCE"
DES/3DES feature is ok...
"RSA/ECB/NoPadding" feature found in provider: "GemplusCrypto"
RSA feature is ok...
Any help would be appreciated!
Best Regards
John

I found the problem, when i removed the key building from the install method and placed it in a separate block the applet installed correctly, but when i request the building of a pair of keys, a Crypto exception NO_SUCH_ALGORITHM is thrown. I have used RSA, RSA_CRT, DSA (every possible length combination) but i get the same exception. If anyone has implemented RSA on a Gemplus (Gemxplore Xpresso Range) card please give me your lights.
Thanks in advance!
John

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