Hi Manish,
Could you please try these steps:
1. Right click your system -> Administration -> Configuration tab
2. Expand daemon.ini -> Expand indexserver -> Instances value should be 1
3. Expand daemon.ini -> Expand sapwebDisp -> Instances value should be 1
4. Expand daemon.ini -> Expand scriptserver -> Instances value should be 1
5. Expand daemon.ini -> Expand xsengine -> Instances value should be 1
Regards
Raj Kumar