Programming a mini using an UNO

Hi everyone. I am trying to program my Mini Pro by using my UNO and going off the instructions from this post:

http://arduino.cc/forum/index.php/topic,7571.0.html

But I keep getting this error when I try to upload a sketch to the mini pro.

avrdude: stk500_getsync() not in sync: resp=0x00

The pro mini has a 328p and I have tried all the 328 mini selections on the IDE.
Any suggestions?

((Note: Retracing my question. Found out that pushing the reset button first, then uploading causes it to upload the sketch no problem. Thanks for looking anyway everyone. Cheers))