Crystal reports 2008 with JDBC connector not working

Here are the specs:-

Crystal reports 2008(Documentum Reporting Services 6.7 SP1)

JAVA 1.5

Connector type:- JDBC

Backend:ORACLE

Hi Experts

Since 3 days I am working on the Crystal reports and trying to eshtablish a JDBC connection using the 2008 version and still facing the same problem

I tried the following :-

1. Deployed the CR version8, DFC client 6.7 sp1.

2. Configured the CRConfig.xml file as per the installation guide Chapter 6. I gave the credentials as per our needs.

3. While creating the new report and trying to connect it gave the error that Check the JDK classpath and IORLocation and that they are wrong.

4. For resolution I browsed several forums and tried everything which was written there like double quoting the classpath, changing the TEMP directory to other directory, removing all the JRE from the system and installing a fresh JRE .15 and pointing the java path to it. But none of this seems to work.

5. At some places it was written that it can be a driver issue and that changing the driver itself will work but I am unable to find a suitable driver.

6. I can try it with eclipse but kavya told me that she tried that already and that preview functionality was not working for her.

7. Kindly suggest what should be done in this direction.

Just for the information, We are working on my Virtual desktop machine where we are not allowed to change any environment variables and touch system settings