Vapor Cansiter small leak?? Service engine light

My 99 Altima has 36000 miles and the service engine light is on. I took it to Autozone and they read the code. The problem was "Vapor canister small leak". I have tightened all the hose clamps to the canister and had Autozone reset the computer. The light came on again. Anyone have any ideas????

Sounds like what's happening to my 2000 altima, service engine light came on but Nissan wants to charge me 75.00 for a diagnostic check. Does autozone charge anything to see what code it is and reset the computer?

I had a problem with my car similiar to that.. i got a code reading :evap sys. malfunction... and had to follow the lines to find out that i had a hole in my canister.. so i just replaced the canister.. they hardly go bad though..