Alternate apt-get mirrors.

add the following in the file /etc/apt/sources.list

# main sources

#
deb http://debian.intergenia.de/debian/ sarge main contrib non-free
#deb-src http://debian.intergenia.de/debian/ sarge main contrib non-free

# non-us

#
deb http://debian.intergenia.de/debian-non-US/ sarge/non-US main contrib non-free
#deb-src http://debian.intergenia.de/debian-non-US/ sarge/non-US main contrib non-free

# security

#
deb http://debian.intergenia.de/debian-security/ sarge/updates main contrib non-free
#deb-src http://debian.intergenia.de/debian-security/ sarge/updates main contrib non-free

# Plesk
#deb http://autoinstall.plesk.com/debian PSA_8.0.1/

# PHP5

#deb http://people.debian.org/~dexter php5 sarge

deb http://dotdeb.netmirror.org/ stable all
deb-src http://dotdeb.netmirror.org/ stable all