2000 Pontiac Montana just replaced water pump now car wont t

Electrical problem
2000 Pontiac Montana V6 Two Wheel Drive Automatic 150000 miles

hello,

I just replaced the water pump my self. And im not that good with my hands but I did it :)
put it all back together went to start it and it wont turn over. The instrument panel come up like you said chimes ect but it wont turn over, when I stop trying to crank it over the security light does come on, also I get nothing from the radio it ejects the CD light up but it wont play anything, I do have the compustar system in it. Im really thing it is something with the security, it is almost midnight and I have been hitting my head for 3h.

also when I remove the key after the security light cam on some of the dash lights stayed on for about 3 seconds then turned off. I hear the fuel pump priming and get all the noises but I don't know what to do it is dead in my father in law's garage.
any thoughts would be great! :)
thanks
matt