Urgent - SAP_ Microsoft Cluster error

Dear Friends,

We Installing our Production servers by using Microsoft cluster service. Our SID is P00

Servers name was SAPP and SAPDB

Today morning we try to start the instance in MMC it could not start. then we see the cluster service status by using Cluster manager we noticed the following errors

SAP P00_00 Service failed

SAP P00_00 Instance Offline

We checked the SAPoscol service it is running. Then we checked the Event viewer same error is repeated in event viewer.

We need your help to sort out this problem

thanks in advance

G.G.Karthickbabu