Could you try loading up the Oracle 11g client and see if that works for you? I don't know for certain that there is an issue with 10g, but I know 11g works because I use it on my laptop with Logicity currently. We have a 9i database but I had to use 11g for some reason and maybe that was it. If that doesn't do it, you might also want to check that you have a version of the client that matches your CPU platform (i.e. x86, x64). Lastly, try a very simple report (no parameters, single table) and see if that works.