1995 Jeep YJ cooling+heating system

I reacently replaced all of my jeeps cooling system (waterpump, radiaator, thrermostat, hoses, andcoolant ) and befor I did that my jeep ran nice and warm for winter but now im lucky to get it to run past the first to ticks on my temp gauge and freeze my ass off driving it anywhere and cant figure out why it wont warm up to opperating temp can you help me out here?