# Error finding module sigantures **URL:** \ **Category:** Module Development\ **Created:** [January 8, 2014, 12:23pm UTC](https://forum.inductiveautomation.com/t/error-finding-module-sigantures/7801 "2014-01-08T12:23:49Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Jagadeesh.K](https://avatars.discourse-cdn.com/v4/letter/j/8baadc/32.png) [@Jagadeesh.K](https://forum.inductiveautomation.com/u/Jagadeesh.K)\ **Post date:** [January 8, 2014, 12:23pm UTC](https://forum.inductiveautomation.com/t/error-finding-module-sigantures/7801/1 "2014-01-08T12:23:49Z")
I want to create new module on module configuration using MongoDBDriver.modl file but after installation , I am getting Message “You have successfully installed” but i am not able to see this in module configuration list and in logs i am getting error :“Error finding module Signatures”. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [January 8, 2014, 4:03pm UTC](https://forum.inductiveautomation.com/t/error-finding-module-sigantures/7801/2 "2014-01-08T16:03:48Z")
Do you have a developer license activated on your gateway? ---
**Author:** ![Jagadeesh.K](https://avatars.discourse-cdn.com/v4/letter/j/8baadc/32.png) [@Jagadeesh.K](https://forum.inductiveautomation.com/u/Jagadeesh.K)\ **Post date:** [January 10, 2014, 1:59pm UTC](https://forum.inductiveautomation.com/t/error-finding-module-sigantures/7801/3 "2014-01-10T13:59:04Z")
Yeah…I have it and I installed that module, but I do not know, how to use or access that module . That module contains .jar file and .xml file. And I need to know how to use or call my Java methods in ignition, using this module. Thank you for your quick reply.