HELP

Hey Lads, have an 02 octavia 1.4 BCA engine. my problem is, ive rebuilt the engine. because it had seized due to poor maintence of previous owner, the oil wasnt getting around so the big crank seized. anywho, everything was changed, I put it all back together, and the problem is that it wont start. its trying to, but wont. ive dropped a dod of petrol into it and there is blowback but thats all. Any idea what it could be? Battery not allowing the injectors to work properly? 

any input would be appreciated thanks