emerge sync is no loner working for me!

[Gnufsh]

Since Friday nigh, I've been getting this error:

rsync error: timeout in data send/receive (code 30) at io.c(103)

!!! Rsync has not successfully finished. It is recommended that you keep
!!! trying or that you use the 'emerge-webrsync' option if you are unable
!!! to use rsync due to firewall or other restrictions. This should be a
!!! temporary problem unless complications exist with your network
!!! (and possibly your system's filesystem) configuration.


What do you tink migt be causing it?