0068 Logon failure error

[sridhar_cheepu]

I have a Cognos cube And copied the cube file ‘xyz.mdc’ under ‘/opt/apps/Cognos/c8/webcontent/samples/datasources/cubes’ location on which the Cognos sever is insattled (cognos is installed on solaris box).
And I have Published the package to the server. I am able to see the Package in the cognos connection.

The problem is when i am trying to create datasource using this cube, we Getting the error called 0068 logon failure error. Can any one suggest how resolve this.