windows 7 ftp upload stops working for file >2K -

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i have strangest problem ftp. after reboot windows command line ftp program works fine.

then, try use friendlier ftp client (totalcommander, have used years) , can log in, folder contents, works until try upload file. seems connection gets closed -- , ftp ability thereafter damaged.

here strange part: ftp upload seems permanently broken. , way broken quite strange. go command line ftp client, , can connect, list folders, change folders, download files of size, upload small files <2kbytes, upload of file bigger 2k causes connection dropped, , command times out.

reboot os (64 bit win 7) , fine again.

i have disabled windows firewall since many discussions centered on this. behavior same whether windows firewall on or off.

i have tried toggling pasv mode, , again, behavior same whether sending passive or not.

i have tried in both binary , ascii mode, , behavior same.

this problem began when reinstalled windows 7 enterprise, service pack 1 on new disk. installed 146+ patches , updates.

network not problem: no problems laptop connected same network. no problems remote server when accessed other machines. isolated new installation of windows.

any ideas @ how running 1 program cause command line ftp become unable send files if >2k?

the problem has magically gone away, , question has won me time honored "tumbleweed" badge.

while inconclusive, problem appeared network driver. application making request somehow put driver in mode limit sending (only ftp far know) less 2k. reinstalled latest network driver , latest chipset drivers, rebooted number of times, no effect. however, installed hp printer driver, , poof, problem went away. might coincidence, or there might os utility got updated result. if has clues why installing hp printer software fix network card, please share.


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