Made the changes and rebooted but still have exactly the same symptoms. I have scrapped the server and reinstalled ISPConfig on a new one and I have everything working perfectly.
Thanks for your help on this one guys. I dont know how long it will take for my ISP to recycle the old vps but as long as its there Im happy to try anything else just so that its documented for other users who may suffer the same fate.
Thanks again. You guys, and ISPConfig, ROCK!!!