Hi Swapnil Zanwar,
Try this:
1. Go to C:\Program Files (x86)\SAP\SAP Business One\Conf
2. Open b1-local-machine.xml and check the following code in bold, if it is "localhost", change it to the IP of your license server
<leaf kind="single" name="LicenseServer" type="String">
<value>localhost:30000</value>
</leaf>
3. Do the same with C:\Program Files (x86)\SAP\SAP Business One DI API\Conf
Hope this help
Regards,
Doan Ngoc