Teaming NICs will not work.
When teaming, the switch also needs to support link aggregation.
This does not mean you can't get 4GB out of a machine, it would be 4 separate 1GB connections on the same IP, so machine 1-4 can all get 1GBps transfer of files, while the server says 4 GBps.
I myself have been trying this, and have had no success yet..