Large files in Windows file sharing

I am trying to access files over the network through drag/drop ("My Network Places", Windows file sharing, network neigbourhood, or whatever you call that) on a LAN Computer. the configuration is both computers are connected to the same switch/having the same subnet, firewalls are disabled.

the transfer of files of sizes up to ~30 MB works fine either way starting from either computer (either one computer get the files from the other or put the files to the other computer)

For files of ~600+ MB (I have no data on the sizes inbetween, so I have no idea where the cut-off is) I have problem getting files from the computer that has it. putting files of such sizes on either computer from the other computer seems fine

(so if I am working on computer A, I cannot access files of ~600+MB on Computer B, but I can put a file of that size to computer B;
if I am working on computer B, I cannot access files of ~600+MB that is shared on A, but I can put a file of such size to A)

Is it normal, a bug, or some part of configuration I have been missing?

I usually use xcopy, but just tried a few copy & paste using W2K and 2003 of files > 8 GB, and had no issues.

I imagine that these files that you are trying to copy have been shared? Is the computer locking up at all when trying to transfer? Are you getting any messages??

bump: nothing yet?

Are you sure about the network channel...Is it working properly???just check it out..