Hi,
1, in SRM system, go to trx SMOEAC to check if the source system is set with name 'CRM' and if RFC destination is set as local SRM system in site attributes.
2, in SRM, go to trx R3AC3 and R3AC1 to check if consumer is set as 'CRM' for all the objects you want to replicate.
3, Please check logs using trx smw01 in SRM to see if there is any specific error so that we can help to identify where the configuration is wrong.
BR,
Ivy