If createScenario button is disabled ? then you can enable this by providing your localmachine host name and port in scenarioManager.xml
Either configure your server as PES Configuring the Process Editor Server
Other option is delete the entry from dss_server_id table and restart your server.
Note only one server connected to same database can edit scenarios.
Check your scenarioManager.xml . It should have something like this
Check dss_server_id table , your machine name should be there in server_id column.
you are right
thanks for d suggestions.