Isolation level on Ora 9i

I have an VB6 application using transactions. The database is Oracle 9i and I use the native Oracle OLEDB provider to access data. When I use the this code:

cn.IsolationLevel = adXactReadUncommitted cn.BeginTrans

I get an error message with number -2147168248 telling me that the isolation level is not supported. I use this on COM+.

If I use the Microsoft OLEDB driver for Oracle it works, but I am handling BLOBs containing documents so I have to use the native driver.

What kind of isolation level is supported on Oracle 9i ?

-- 
Regards
Robert Vabo
Gecko AS
www.gecko.no