SMLG has response time -1

Dear all,

Our system is NW 7.3 with 720 kernel BI abap +java system. We are getting strange issue in SMLG, all instances(CI and DI's) shows response time as -1.

We refereed SAP Note 422129 - RZ21: Contexts are in incorrect segment. seems not usefull to solve the issue. Since this is production system , we need it for mandatory monitoring.

Please suggest for a solution

Thanks

Vinayag KC