Job Server not working in linux

Hello Experts,

We have Dataservices and IPS installed in the linux server . I configured a Job server(DS_JOB)  in the server( by command : ./svrcfg ) , the jobserver is in running mode in a port 3500.

When i try to execute any job in DS designer , i select the Job Server(DS_JOB) which is created in the server , then i get error msg "The selected Job server is not working" .

The port 3500 is opened in firewall.

Please help me in this.

Thanks in advance.

Aisurya