Sybase ASE OLE DB Provider adCmdStoredProc bug

Hi,

When I exec a sybase procedure from Visual Basic, the "NULL
comparation" (if xxx = NULL) doens't run. However if the sintax is "if
xxx is NULL" it runs fine.

This is the "About Sybase ASE OLE DB Provider" text:

Sybase ASE OLE DB Provider can be thought of as an "adapter" from ADO/
OLE DB applications to Sybase databases, version System 11 and
Adaptive Server 11.5, 11.9.2, 12.0, and 12.5. With Sybase ASE OLE DB
Provider (the "Sybase ASE provider"), you can access data and perform
complex SQL queries on data from Sybase database systems.
The Sybase ASE provider runs in the Windows environments.
The Sybase ASE provider file name is SYDAASE.DLL.

and this is the Sybase ASE version:
1> select @@version
2> go
Adaptive Server Enterprise/11.9.2.4/1177/P/SWR 9580 ESD 4/HP9000-735/
HP-UX 10.2/FBO/Thu Apr 5 17:48:52
2001

(1 row affected)

Any hint?

Thanks in advance,
Jose Luis
.

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