Java SE (Java Platform, Standard Edition)

Hi . i'm trying to sign one pdf file with token safeNet IKEY 2032 but when i use SUN PK-CS11 i got the following error: sun.security.pkcs11.wrapper.PKCS11Exception: CKR_MECHANISM_INVALID

and when i use the iTEXT i can sign but when i open the pdf on acrobat reader i got the following error:
Error during signature verification.

Error encountered while validating:

Error encountered while BER decoding:

can anyone tell me what im doing wrong?

tks
sorry my english