Hi Vikas,
In Administration module click on integration-->Integration Service-->Integration Administration. Click on B1ifadmin and then click on SLD then a list of DB's and options will be displayed . In that list company db name which you are trying to connect from mobile app should be displayed else create that new system in SLD and then if you click on that DB on the right a window appears .There You have B1DI & JDBC Test connection will be available.check the test connection. If test connection failed then follow notes such as 1618978,1924930,2029714, Troubleshooting B1iC and throughly set up the settings in the document." V33 how to b1if "
Almost all possible errors for mobile app issues comes under these documents.I hope this helps.
regards,
Sathish B