Nissan serena non starting problem
 

HELP!!

Hi to all, i have got a 1995 Serena 2.0td, had a haead gasket failure. Have replaced the gasket, however the vehicle is not starting with the settings i have used to set up timing, etc. Can anyone shed any light as to what i might need to do or could anyone point me in the direction as to what i should be looking at. Car turns over but will not fire. Any help would be greatly appreciated. Thanks in advance, Jon