i had the same problem when i was activating some BF in SFW5 ...
Planned Status: Business func. will remain activated
Addition Prerequisites:
"For this businss function, there are possibly dependencies or
requirements that do not yet allow activation of the business function.
If you need to carry out additional activities, you will find more
information in the documentation on the business function. ."
i just open the client on SCC4 and SE06 ( modifiable)
now its works
best regards
Alessandro Toledo