There are known issues that occur after an upgrade from SRM 5.0. Per sample, doubts about roles that must be used in the Portal and in SAP_GUI, some issues related to missing relationship between BP numbers, Events/Alert issues, issues when confirming Goods and Services, etc.
I have created the "SAP KBA 1781127 - Upgrade Issues from SRM 5.0 to SRM 7.0 and on" which is a collection of notes that solve these known issues.
