Crystal Reports SBO 8.8 - Token paramters that includes another parameter

Dear Experts,

I need some help with the following:

I have created an crystal report with 2 Token-Parameters like this:

1.

Customer@SELECT CardCode FROM OCRD

2.

Items@SELECT distinct dln1.itemcode FROM ODLN INNER JOIN DLN1 ON ODLN.DocEntry = DLN1.DocEntry WHERE (ODLN.CardCode = '@Customer')

The second paramter includes the first one and so far everything works fine. If I choose with the first parameter the customer, the second paramter shows all items for the customer in table ODLN/DLN1.

But now, when I allow multiple values the list of items is empty.

Any ideas?

SBO Version 8.8 PL13

Thanks.