Garcia505

so i have a 92 dx with a d15 i have just replaced the head gasket due to the white smoke it was pushing out but now i have put everything back together and the first two start ups it fired right up but now it wont start it has compression fuel spark i have checked it all the spark plugs the distributor and ignition wires are new also still i have nothing can anyone help me?! it turns right over it doesnt backfire or anything it sounds fine but just wont start