You're gonna need either:
1) a 
network cable tester
2) a continuity meter and a very long RJ45 extension lead
3) a continuity meter, a long piece of bell wire and an assistant
You've either got the wires jumbled up or one or more of the connections is not correct. Pin 1 should be connected to pin 1 etc.
Check you've used the right wiring here:
http://en.wikipedia.org/wiki/TIA/EIA-568-B
It doesn't matter if you use T565A or T565B (most common) - so long as you're consistent.