Hi Maria,
Please read up on SLD and LMDB
System Landscape Directory (SLD)
Landscape Management Database (LMDB)
What you basically want to check is whether the SAPRouter information on the system in question is being carried over from the SLD to the LMDB then to the Service Marketplace.
The topics are quite broad ...
to access the SLD:
http<s>://<SLD Host>:<port>/sld
To access LMDB, execute transaction LMDB from Solution Manager.
Regards,
Jing