Hi Pratap,
Do one thing , Installed MMC in your system and connect with MMC , Here you will able to see the exact situation ...
If SAP is properly started and you are not able to login, Did you disable the firewall ? and maked selinux as Premissive ..
Or you can check DPMON to check the Work process.
OR try R3trans -d and find the exact error.check the SAP Note 39439 - XUSER entries for SAP MaxDB
Regards
Rableen
