Upgrading from Iseries 810 (v5r2) to Iseries 520(v5r4) sap 4.6c

We're upgrading our ISeries 810(v5r2) to Iseries 520(v5r4).

WE did a save 21.

Ran restore 23 (omitted libraries qgpl and qusrsys on rstlib)

ALl userprf - configuration - libraries - dlo - authority all were restored.

New kernel library (2291).

When we go to start SAP on iseries (v5r4) it starts and quickly ends.

WE have no logs - nothing gets created.

Please Help

Where's the problem

Thanks

Joe