Third-Party Remittance in ERP

We are in the process of upgrading from 4.6c to ERP2005. When running third-party posting we get the following error:

No entry in table T52EK for key /401 F or Q

Table T52EK contains the symbolic accounts and what type of account they are. /401 should not be in this table.

We use SAP standard schema U500. I tried deleting the schema in ERP to see if there was a newer version, but there isn't.

Does anyone have any ideas on how to fix this? Does it have anything to do with the new configuration for payroll posting where you split the tax wage types?

Any help is appreciated.