I don't know what I did step by step... Now it's working.
1. Download Option oracle from their website.
2. Replace the files with the files you find in this post. http://www.indi traders.com/software/8090-options-oracle-source-code-3.html#post188043
And try now...
If it is not working, download plugin from the link posted by flyingdeath and Cautious.
- Try these plugins one by one by replacing/pasting in the said folder.
I tried that before, and again I tried it now... It didn't work. Actually, the version I downloaded from option oracle website is working after some tweak suggested in the other forum and plugins by flydeath & cautious.