DB2 install fails - linux 64

Hi,

this is what I found in the log file while trying to install db9.7 in linux64 box.

Registering DB2 licenses :.......Success

ERROR: The value "DB2SYSTEM=dfc03sss" could not be added to the Global Profile
Registry. Return value is "255".

Setting default global profile registry variables :.......Failure
Initializing instance list :.......Success
Registering DB2 Update Service :.......Success
Updating global profile registry :.......Success
WARNING: A minor error occurred while installing "DB2 Enterprise Server Edition
" on this computer. Some features may not function correctly.

please help.