Hi Anil,
Pls refer below notes ,
| 441639 | Security Audit: No evaluation occurs in transaction SM20 |
| 107417 | SecAudit: configuration with SM19 / no. of filters (slots) |
check below threads for similar error,
http://scn.sap.com/thread/3381876
SAP security audit log setup | Sap Basis Information
Regards
Nayeem