When i install content server 6.5 occur an error message

here is what is sayd log message:
(02.08.2009 22:30:48), Setup.product.install, com.documentum.install.shared.common.error.DiException, err, An exception occured in: DiWAUpdateWindowsUserPrivilege, beanID: UpdateUserPrivileges - Error - ????????? ?????????? ??????? ?????/??????. Please read error log (!ERROR unexpected EOF!) for more information.; For more detailed information, see the error log:
\documentum6.5\dev_edition_6.5_sp2_windows_sql\setupError.log
(02.08.2009 22:30:48), Setup.product.install, com.documentum.install.shared.common.error.DiException, err, com.documentum.install.shared.common.error.DiException: ????????? ?????????? ??????? ?????/??????. Please read error log (!ERROR unexpected EOF!) for more information.
at com.documentum.install.server.common.beans.wizard.action.DiWAUpdateWindowsUserPrivilege.execute(DiWAUpdateWindowsUserPrivilege.java:78)
at com.installshield.wizard.RunnableWizardBeanContext.run(Unknown Source)
err: ---- BEGIN "Global Context: " output ---- (Sun Aug 02 22:30:48 MSD 2009)
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Install on operation system: Vista premium. RDBMS - Oracle 11.1, JRE - 1.6
If anybody now what is problem here, please help to resolve it.
Best regards
Sergey