I have had not problems with 10gR2. Read the README.win32.txt for details on how to install and compile DBD::Oracle for windos. If you are getting SQLPlus errors then you most likely have not configured your Oracle enviornment correctly. Get SQLPlus to connect first then you can get DBD::Oracle to work. By the way you would be much better off posting your question to dbi-users@perl.org (you don't need to subscribe in order to post, and you won't be automatically subscribed either as very few people use this form for dbi or driver support. dbi-users is where you'll get the best support.