GPG win32 problems with PGP 6.5.3/7.0

[dueze]

Using GnuPG 1.0.2 for Win32, I have problems with PGP for Windows.

Public encryption, conventional encryption, signatures, detached
signatures, with or without armor, aren't recognized by PGP 6.5.3 and 7.0
beta 176 ("bad signature", "bad packet", "invalid password").

With PGP 7.0, --clearsign is OK but it fails in PGP 6.5.3.

GnuPG seems to recognize all signatures and encrypted files produced by PGP
for Windows.

Is there an incompatibility with symmetric or public algorithms between
GnuPG win32 and PGP?

--
Daniel