Unable to load DLL 'OraOps12.dll

I build and publish my project with oracle client 12.1.0 and deploy it to server which has 11.1.0 client but I got this error. How could I solve this? Please help me ? My Error -

Unable to load DLL 'OraOps12.dll

The specified module could not be found. (Exception from HRESULT: 0x8007007E) at Oracle.DataAccess.Client.OpsInit.CheckVersionCompatibility(String version) at Oracle.DataAccess.Client.OracleInit.Initialize() at Oracle.DataAccess.Client.OracleConnection..cctor()

Its too late but i have this issue even i have installed both 32bit and 64bit oracle drivers. Just i change the Identity in ApplicationPool and Enable 32 and well then its working.