Strange Problem with MOVC FPT command

Hi All.

Since some time, I am having strange problem with MOVC FPT for some time now on DX100. I have a double circle with command as follow:

[code]		 SET LI000 0
		*DC
		'DOUBLE CIRCLE
		 MOVC P[LB007] PL=LB006
		 MOVC P[LB008] PL=LB006
		 MOVC P[LB009] PL=LB006
		 MOVC P[LB010] PL=LB006
		 MOVC P[LB007] PL=LB006 FPT
		 INC LI000
		 JUMP *DC IF LI000<2

[/code]

The problem is, the robot speed is lower between command MOVC P[LB010] PL=LB006 and MOVC P[LB007] PL=LB006 FPT than other section. Value of LB006 is 1.

The code was working fine earlier. Is it controller or singularity problem?

Thanks for any input!

Yes, the speed is set at the top of main program using SPEED V= x mm/s. X used 50, 70, 100.