GP2013 - eConnect taRMApply - Multi-Currency Transactions Not working


Have anyone tried using taRMappy method to apply receivables credit documents (credit memos / Returns)  against the Invoices OR Debit Memos, etc?  It works for the Functional Currency transactions but fails for foreign currency transactions.  Is it still not supporting with GP2013?  

What are the other way around to apply Credit Memos / Returns against the invoices as I've daily around 400 Returns to be applied against 2000 Invoices / Debit Memos?  Overall daily my returns would be 30% of my total sales documents which, If I don't apply, will reflect in aging as negative balances.

Any help / clue is highly appreciable.