Hi Chidambaram Ramasamy
Also check
C:\Program Files\SAP\SAP Business One\Conf\b1-local-machine.xml
Search your server name is actual or not ??
check the below highlighted one point your correct license server or not and change according..
<leaf kind="single" name="LicEventTimeOutSecs" type="ULong">
<value>140</value>
</leaf>
</node>
<node name="SAP Business One">
<leaf kind="single" name="LicenseServer" type="String">
<value>*10.91.5.6:30000*</value>
</leaf>
</node>
</node>
Regards
Kennedy