SAP Adapter 4.6 tp SAP 7.0

I’m trying to setup a connection between our IS 6.5 using the SAP Adapter 4.6 SP 5 Fix 5 to a SAP 7.0 and the listener is created and it appears to setup. However, when I click the Test Connection I get “FU_NOT_FOUND” error and the user is then locked in SAP. I have a number of other connections between this wM server and SAP but the versions of SAP are 4.6-6.4. My question is does the adapter support SAP 7.0 or could it be something else?