Office scan 10.0 installation errors

I have tried to install OfficeScan 10.0 on a server but the installation always fails. Can anyone tell how to fix this problem?

OfficeScan 10.0
Backing up and replacing OfficeScan-related files
Filegroup23. [Creat Directory : C:program filesTrend MicroOfficeScanPCCSRVBackupServicePack1_Patch2_B2812Admin]
Failed
Trend Micro Install
Installation failed!
