Error while installing WebAS Java 6.40

Hi,

Can you clarify me on rectifying this error.Prior to installtion of sap webas java,I installed oracle database software on my server.When I go for installing webas java,after providing the sdm password, installation is getting started.Installation is showing it has completed 1st phase out of 33 phases has been completed.But when it is switching to the second phase,it is throwing an error message as:

FSL-00001 SYSTEM CALL FAILED.ERROR 1332(NO MAPPING BETWEEN ACCOUNT NAMES AND SECURITY ID'S WAS DONE.) IN EXECUTION OF SYSTEM CALL 'LookAccountName'