any body help me with mitsubishi meldas 310 mill

when i transfer a program (this program creat by power mill & send to the machine by cimco edit ) to the memory & execute this program from memory i dont have any problem & the xyz axis run very good &smooth & countiuse but when i want to run this program from pc by direct connection (dnc mode) yhe xyz axis dont run smooth & i have a step-by-step move (like this -----) two program are same and all setting in cnc are also same