viruses or false positives?

I just ran an online scan of a file on my machine at www.virustotal.com and it returned the following results. Would you say the file is infected or are these false positives?

Antivirus - Result
AhnLab-V3 - nothing
AntiVir - TR/Proxy.Horst.aae.14
Authentium - nothing
Avast - nothing
AVG - nothing
BitDefender - nothing
CAT-QuickHeal - TrojanProxy.Horst.aae
ClamAV - nothing
DrWeb - nothing
eSafe - suspicious Trojan/Worm
eTrust-Vet - nothing
Ewido - nothing
FileAdvisor - High threat detected
Fortinet - nothing
F-Prot - nothing
F-Secure - nothing
Ikarus - Trojan-Proxy.Win32.Horst.aae
Kaspersky - nothing
McAfee - nothing
Microsoft - nothing
NOD32v2 - nothing
Norman - nothing
Panda - Suspicious file
Prevx1 - nothing
Rising - Hack.Win32.Keygen.a
Sophos - Mal/Generic-A
Sunbelt - Trojan-Proxy.Horst.aae.14
Symantec - nothing
TheHacker - nothing
VBA32 - Trojan-Proxy.Win32.Horst.aae
VirusBuster - nothing
Webwasher-Gateway - Trojan.Proxy.Horst.aae.14