Windows 2000 Advanced Server crashes when copying files larger than 1gb

I need help

My 2000 Adv. Server becomes unavailable for minutes when we copy file to/from it larger than 1Gb.
there are events

Event Type:      Warning
Event Source:      Srv
Event Category:      None
Event ID:      2022
Date:            8/11/2004
Time:            14:27:16
User:            N/A
Computer:      W2KSRV01
The server was unable to find a free connection 19 times in the last 60 seconds.
Generally followed by:

Event Type:      Warning
Event Source:      MRxSmb
Event Category:      None
Event ID:      3019
Date:            8/11/2004
Time:            15:27:22
User:            N/A
Computer:      W2KSRV01
The redirector failed to determine the connection type.

It's an AD/file server, Windows 2000 Advanced Server SP4, we got 35 users, its a Proliant G3 Xeon P4 2.4GHz with 2Gb RAM, 180Gb HDD and 60GB free.
It is connected to two bridged catalyst 3548XL via Gigabit Ethernet and the users are 100Mbit.

I'm pretty sure my hardware setup is large enough for our 35 users, but can't figure out why it stops responding for minutes (crashing all the softs on users desktops) when we do a large file transfer...

Has anyone an idea?

Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

how are you transferring the file? xcopy, cut and paste, ftp etc???
This may be worth a look,
How do I troubleshoot Event ID 2021 and 2022?

Deb :))

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Windows 2000

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.