ZMySQLDA on solaris10

Dear all,
Since some day I am trying to install ZMySQLDA on a sunblade1500 (Solaris10) 
workstation, but running my zope instance in debug mode "off" I always get 
errors like (from .../log/event.log):

------
2007-02-22T12:11:20 ERROR Zope Couldn't install ZMySQLDA
Traceback (most recent call last):
  File "/opt/Plone-2.5.2/lib/python/OFS/Application.py", line 755, in 
install_product
    global_dict, global_dict, silly)
  File "/home/wwhypda/plone/instance_test01/Products/ZMySQLDA/__init__.py", 
line 91, in ?
    import DA
  File "/home/wwhypda/plone/instance_test01/Products/ZMySQLDA/DA.py", line 92, 
in ?
    from db import DB
  File "/home/wwhypda/plone/instance_test01/Products/ZMySQLDA/db.py", line 89, 
in ?
    import _mysql
ImportError: ld.so.1: python: fatal: relocation error: 
file /home/wwhypda/plone/instance_test01/lib/python/_mysql.so: symbol 
mysql_errno: referenced symbol not found
------

I have:

- MySQL 5.0.27 from binaries for solaris10
- Plone version installed: 2.5.2
- MySQL-python-1.2.1_p2 installed using the Python version that comes with 
Plone (2.4.4)
- ZMySQLDA 2.0.8 (also tried 2.0.9b3)

Have you some suggestion, please?
Thank you in advance!
Bests,

Alessandro