PGP can't decript messages encripted with GPG

[Salvador]

Doing test for verify "how to take" the GPG and PGP, I have happened me the
next:
I Importe correctly the keyring of GPG 1.0.3 in PGP 6.5.8.
I  encripted a message with GPG 1.0.3. Once, I trated of decrypt this with
PGP, saaying the program:
"An error has ocurr: Encripted sesion key is bad"
Why is this? Exist a way of correct this?

Thanks

Salvador Vicente
SalvadorVicente@NOESPANbigfoot.comNOSPAN

P.D. Sorry my bad english!

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