Hi Rao,
Kindly share saprouttab & dev_rout file for analysis.Are you able to perform successful test connection with SAPOSS .
Try to check with OSS1.In addition if you used password authentication under saprouttab file then your string would be as like
/H/XXX.XXX.XXX.XXX/S/3299/W/<password>/H
Regards,
Gaurav