Mr. Ay,
Thanks a lot for help!
I followed the steps like this:
1. I pointed the cursor over the first link in your original post and got the following link: http://www.coade.com/cgi-local/ultimatebb.cgi?ubb=get_topic;f=1;t=000858
2. The current link where I was is: http://65.57.255.42/ubbthreads/ubbthreads.php?ubb=showflat&Number=48743#Post48743
3. Noted the post number from old link which is 000858.
4. Changed the post in 2 above to read like this: http://65.57.255.42/ubbthreads/ubbthreads.php?ubb=showflat&Number=000858#Post000858
5. But the result is that I reach a thread titled “Offshore Fields” started by member Saneh Gupta.
6. Reducing one zero from 000858 gives me the same result.

So what I am doing wrong here?