FTP Connection

Guys,

My receiver FTP is shooting the following error.

Delivery of the message to the application using connection File_http://sap.com/xi/XI/System failed, due to: com.sap.aii.af.ra.ms.api.RecoverableException: Error when getting an FTP connection from connection pool: com.sap.aii.af.service.util.concurrent.ResourcePoolException: Unable to create new pooled resource: ConnectException: Connection refused (errno:239).

I checked the userid and pwd and seems to be valid. I even changed the connect mode to permanent , but still facing the same issues.

Please do help me on this issue.