Sounds like you need buffering.
What is buffering set to?
You can check by issueing a

?cursorGetprop("BUFFERING")

If it returns 1 to you screen, you need to change your buffering.
You might have to do this in the command line or in you main program

SET MULTILOCKS ON
&& 1 = no buffering, 2 = P.R. Buffering, 
&& 3 = O.R. Buffering, 4 = P.T. Buffering, 5 = O.T. Buffering
&& I use 3 or 5 mostly But you my want to check 
CURSORSETPROP('BUFFERING',3)