help..

acquired a laptop with more mem and speed and setup emc on this all seemed ok untill i started doing some long rapids and system sets error and looses steps. have double checked latency approx 14000. the rest of the system less the laptop was running fine on old 450mhz desktop prior to swap.
getting joint follow errors when rapiding for any distance. I have changed vel. and acc. in stepconfig.ini played with latency nothing.
can these settings be changed globaly in my ini file or run stepconfig.
I ask because rapids dont sound the same as what i get when testing in the stepconfig wizard. system runs everything program wise.

stepper system
ubuntu 6.06
emc 2.2.3

Thanks gads