What happens if you open the file in another editor (gedit, kwrite, vi or whatever you use) ?
Or if you copy from the net-mount ?
The local host is Win7. RHEL5 just runs in VirtualBox.
I use the command 'mount -t vboxsf share mount_point' to mount files by VirtualBox's Shared Folders.
It 's ok, if i open the code file by vim or gedit.
If i copy or checkout to RHEL5, the C::B editor will respond quickly. but not the opposite.
Thanks for your help, much appreciated.