Hi Ken, thanks your reply first.

1. my data is store in locla VFP tables.
2. just as simple as ask the user Quit the program or not, or other simple command.
3. just common PC running P4-2.0GHz CPU, 256MB RAM. 40GB HD with 30GB free.
4. network users are less than 20.

Yesterday, I've just installed the same program and copy the same data (actually it
is small) into another machine running Windows 2000 Pro. and Windows 2000 Server
network environment. I tested the whole program by going into to all functions for
half day, but nothing found for delay problem! The testing is very smooth. The Win2K
Pro is running only at 128MB Ram and P4-1.8GHz CPU. So finally I make a conclusion
that the delay problem is caused by Win2K and Novell Server. However I don't know
where is the problem. hmmmmmm -_-
Anyway, thanks for your help.