Assigning Roles to Roles

I have MS SQL Server 2000 DB.
I have created a User and created some tables for the same.
I created a Role named A and granted Select Permissions for few tables to that roles.

When I created another Role named B and added this role (A) to B, the permissions are not being xferred to B. Bcos of which, if i assign an User to Role B, he is not able to select the tables for which permissions have been given thru role A.

Note : If i give assign directly the user to Role A, it is working. But i want to assign User to role A only thru B.I have to test it, but I find it hard to believe...

Why do you want to do this though?