Server Error message when creating new flow service

hello…

i have started using SAP BC as required by my company… i am just creating an empty flow service when i received the below message…

Could not create ‘FolderA:TesterA’.

com.wm.app.b2b.server.ServiceException: [B2BSERV.0026.9103] Unable to write to flow.xml

when i check the details, it says “SERVER ERROR” and nothing else… i looked into the docs that’s available in the doc directories but there’s no explanation… can someone help me identify this problem and find a solution?

thanks a lot
cram_1998@yahoo.com