After realising my WOAI Delta/NWA traffic was woefully out of date I downloaded the Winter 2009/2010 flightplans for Delta from Alpha India, installed all the paints for the planes, then compiled using TTools. The file for the traffic is physically present in the Scenery/World/scenery folder and there were no install errors when using TTools. However I have not seen hide nor hair of Delta even at KATL during rush hour 100% traffic active. All other Alpha India packages have worked fine.As an extra piece of information I use Windows 7 64 bit.Thanks guys.Alex

Problem solved it turned out the aircraft titles were incorrect sorry for the hasty post here.