Hi Rossella,
first of all, have you tried to refresh the report?
otherwise, it might be that you need to reorganize your Cash management data - you can use trans. code FDFD for that. Please check a description before - http://help.sap.com/saphelp_45b/helpdata/en/35/b0e6a987a62488e10000009b38f9b7/content.htm
Kind regards,
Renatas