Update problem?

Tried updating avast in school, this is what I get.

01.12.2009 11:59:50 general: InvalidateCurrent: invalidated server ‘Download731 AVAST Server’ from ‘main’
01.12.2009 11:59:50 general: SelectCurrent: selected server ‘Download707 AVAST Server’ from ‘main’
01.12.2009 11:59:50 internet: SYNCER: Type: use IE settings
01.12.2009 11:59:50 internet: SYNCER: Auth: another authentication, use WinInet
01.12.2009 11:59:50 internet: while trying to get file ‘vps-9112901.vpu’, error 0x20000006 has occured, try 1
01.12.2009 11:59:50 file: Server returned 404 on file vps-9112901.vpu
01.12.2009 11:59:51 general: InvalidateCurrent: invalidated server ‘Download707 AVAST Server’ from ‘main’
01.12.2009 11:59:51 general: SelectCurrent: selected server ‘Download667 AVAST Server’ from ‘main’
01.12.2009 11:59:51 internet: SYNCER: Type: use IE settings
01.12.2009 11:59:51 internet: SYNCER: Auth: another authentication, use WinInet
01.12.2009 11:59:51 internet: while trying to get file ‘vps-9112901.vpu’, error 0x20000006 has occured, try 2
01.12.2009 11:59:51 file: Server returned 404 on file vps-9112901.vpu
01.12.2009 11:59:51 general: InvalidateCurrent: invalidated server ‘Download667 AVAST Server’ from ‘main’
01.12.2009 11:59:51 general: SelectCurrent: selected server ‘Download926 AVAST Server’ from ‘main’
01.12.2009 11:59:51 internet: SYNCER: Type: use IE settings
01.12.2009 11:59:51 internet: SYNCER: Auth: another authentication, use WinInet
01.12.2009 11:59:51 internet: while trying to get file ‘vps-9112901.vpu’, error 0x20000006 has occured, try 3
01.12.2009 11:59:51 file: Server returned 404 on file vps-9112901.vpu
01.12.2009 11:59:51 internet: tried 3 servers to get file ‘vps-9112901.vpu’, but failed (0x20000006)
01.12.2009 11:59:51 package: DldPackage: C:\Program Files\Alwil Software\Avast4\Setup\vps-9112901.vpu, returned 0x20000006
01.12.2009 11:59:51 general: Err:Other HTTP error (404), while trying 70.85.98.50:80//iavs4x/vps-9112901.vpu

I have a feeling this is caused by my school’s proxy.

Are you required to login to the school VPN/Proxy ?

If required:
Have you set the schools proxy settings in program settings, Update (Connections) Proxy button, and manually set the proxy ?