error while running ''aspnet_regsql''

When i am trying to run the 'asnet_regsql' i am getting the following error? Please help

Unhandled Exception: System.BadImageFormatException: Could not load file or asse
mbly 'aspnet_regsql.exe' or one of its dependencies. An attempt was made to load
a program with an incorrect format.
File name: 'aspnet_regsql.exe'

[431 byte] By [yuvarajp4u] at [2008-1-9]