Thanks all of ya for replying, and here the answer for each one of ya ;
Lone Wolf, i checked the shortcut path..and its was fully correct , i even tried to run the program from the "directory" but still the same !!
maverick_teck, i tried to run NAV from start > programs but the same problem , wat only runs from the menu is (Live update )..and OF COURSE it says it failed to retrieve the updates !! my OS is WinXP pro
perkoset, i'll search their site and see wats there...
Thanks again all of ya...i'll inform ya with the updates