Several things you should look at:
1. Server event logs – application and system in particular. What events are causing this service to shutdown?
2. Contact the software provider and open a support ticket. Also, try searching their support knowledgebase or online support forums specific to this software product. You did not provide any particular details about this application in this forum. It makes it difficult for us to assist without more details.
3. Consider implementing all operating system and application patches/updates. This may increase the stability of the server and application and permit it to run uninterrupted.
Please post more details if these suggestions do not assist with resolution.