Indexed allocation

 I have created indexed allocation. Now this works fine with other accounts except one which requires Posting edit code. I have tried following but none seems to be working :

1) tried providing range from Subledger# to subledger#

2) tried keeping it balnk for range

3) Tried giving one particular subledger .i.e To & From is same.

When i compute this allocation this does not raise any errror but system skip this particular a/c from computing.