Hi,
Did you maintain all currencies in that currency attributes? you have valid main char.s values in your info provider?
what exactly is your issue? like currency conversion is not happening or error during conversion? Please provide more details.
Also please refer this link from SAP and ensure you have followed all steps.
http://help.sap.com/saphelp_nw70/helpdata/EN/5a/8c5849b7fae266961ed707 /content.htm
or search with "Determine target currency from info objects" to get more SCN threads.
