unable to upgrade

[akashif]

hi,

i am trying to upgrade from plesk 8.0 to 8.1 using autoinstller. but it failed every time.

here is the download and installation Process..

N) Install Plesk and all required packages; P) Go back;
Q) Cancel installing; L) Show list of packages;
Select action [N]:
Download file base/courier-imap-3.0.8-fc4.build81061129.22.i586.rpm: 10%..20%..30%..40%..50%..60%..70%..80%..90%..100% done.
Download file base/psa-8.1.0-fc4.build81061129.22.i586.rpm: 10%..20%..30%..40%..50%..60%..70%..80%..90%..100% done.
Download file base/psa-api-8.1.0-fc4.build81061129.22.noarch.rpm: 10%..20%..30%..40%..50%..60%..70%..80%..90%..100% done.
Download file base/psa-courier-imap-add-8.1.0-fc4.build81061129.22.i586.rpm: 12%..21%..31%..41%..50%..60%..72%..81%..90%..100% done.
Download file base/psa-horde-3.1.3-fc4.build81061129.22.noarch.rpm: 10%..20%..30%..40%..50%..60%..70%..80%..90%..100% done.
Download file base/psa-hotfix2-8.1.0-1.noarch.rpm: 85%..100% done.
Download file base/psa-imp-4.1.3-fc4.build81061129.22.noarch.rpm: 10%..20%..30%..40%..50%..60%..70%..80%..90%..100% done.
Download file base/psa-libpam-plesk-8.1.0-fc4.build81061130.12.i586.rpm: 16%..33%..50%..67%..84%..95%..100% done.
Download file base/psa-locale-base-en-US-8.1.0-fc4.build81061129.22.noarch.rpm: 10%..20%..30%..40%..50%..60%..70%..80%..90%..100% done.
Download file base/psa-logrotate-3.7-fc4.build81061129.22.i586.rpm: 10%..21%..31%..42%..51%..62%..73%..80%..91%..100% done.
Download file base/psa-proftpd-1.3.0-fc4.build81061129.22.i586.rpm: 10%..20%..30%..40%..50%..60%..70%..81%..90%..100% done.
Download file base/psa-proftpd-xinetd-1.3.0-fc4.build81061129.22.i586.rpm: 28%..57%..70%..86%..100% done.
Download file base/psa-pylibplesk-8.1.0-fc4.build81061129.22.i586.rpm: 10%..52%..70%..100% done.
Download file base/psa-qmail-1.03-fc4.build81061129.22.i586.rpm: 10%..20%..30%..40%..50%..60%..70%..80%..90%..100% done.
Download file base/psa-selinux-8.1.0-fc4.build81061129.22.noarch.rpm: 12%..60%..100% done.
Download file opt/updater/psa-autoinstaller-3.1.0-build31061201.02.i586.rpm: 10%..20%..30%..40%..50%..60%..70%..80%..90%..100% done.
Download file opt/perl/perl-Apache-ASP-2.59-fc4.build81061129.22.noarch.rpm: 12%..23%..30%..42%..50%..60%..72%..80%..90%..100% done.
Download file opt/perl/perl-Font-AFM-1.18-63psa.fc4.build81061129.22.noarch.rpm: 15%..38%..72%..100% done.
Download file opt/perl/perl-FreezeThaw-0.43-63psa.fc4.build81061129.22.noarch.rpm: 16%..79%..97%..100% done.
Download file opt/perl/perl-HTML-Format-1.23-53psa.fc4.build81061129.22.noarch.rpm: 12%..83%..100% done.
Download file opt/perl/perl-HTML-Tree-3.16-fc4.build81061129.22.noarch.rpm: 15%..21%..34%..41%..54%..60%..73%..80%..93%..100% done.
Download file opt/perl/perl-MLDBM-2.01-63psa.fc4.build81061129.22.noarch.rpm: 100% done.
Download file opt/perl/perl-MLDBM-Sync-0.30-63psa.fc4.build81061129.22.noarch.rpm: 32%..89%..100% done.
Download file opt/mailman/psa-mailman-configurator-8.1.0-fc4.build81061129.22.i586.rpm: 32%..75%..100% done.
Download file opt/java/psa-tomcat-configurator-8.1.0-fc4.build81061129.22.noarch.rpm: 10%..22%..32%..42%..55%..60%..70%..80%..94%..100% done.
Download file opt/mail/perl-Text-Iconv-1.2-24psa.fc4.build81061129.22.i586.rpm: ERROR: Curl download failed: The requested URL returned error: 503 Can't download http://autoinstall.plesk.com/PSA_8....Iconv-1.2-24psa.fc4.build81061129.22.i586.rpm
ERROR: Installation failed

i have tried many times but always failed and gives same Error..

thanks

Ali Kashif