restarted the whole server and checked the error_log file.
172.89.5.70 is my HP SIM SERVER
[Wed Dec 28 09:04:34.918851 2016] [core:warn] [pid 2652:tid 396] AH00098: pid file C:/hp/hpsmh/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run? [Wed Dec 28 09:04:35.932857 2016] [mpm_winnt:notice] [pid 2652:tid 396] AH00455: CompaqHTTPServer/9.9 HPE System Management Homepage/7.6.0.11 (Win64) OpenSSL/1.0.2h PHP/5.5.38 configured -- resuming normal operations [Wed Dec 28 09:04:35.932857 2016] [mpm_winnt:notice] [pid 2652:tid 396] AH00456: Server built: Sep 17 2016 02:03:08 [Wed Dec 28 09:04:35.932857 2016] [core:notice] [pid 2652:tid 396] AH00094: Command line: 'C:\\hp\\hpsmh\\bin\\hpsmhd.exe -d C:/hp/hpsmh -f C:/hp/hpsmh/conf/smhpd.conf' [Wed Dec 28 09:04:35.932857 2016] [mpm_winnt:notice] [pid 2652:tid 396] AH00418: Parent: Created child process 3392 [Wed Dec 28 09:04:37.461667 2016] [mpm_winnt:notice] [pid 3392:tid 416] AH00354: Child: Starting 64 worker threads. [Wed Dec 28 09:05:49.418909 2016] [:notice] [pid 3392:tid 1104] [client 172.89.5.70:55126] Session maximum set to 128 [Wed Dec 28 09:05:49.418909 2016] [:error] [pid 3392:tid 1104] [client 172.89.5.70:55126] mod_smh_config: unable to open session information from DBM: 720002 [Wed Dec 28 09:05:49.418909 2016] [:error] [pid 3392:tid 1104] [client 172.89.5.70:55126] mod_smh_config: unable to open session information from DBM: 720002