Process flow is slow

We are experiencing process flow slowness and got a lot error messages in pflow.out. saying Login failed and connection failed. Retries left: 5

Anyone had similar issue before and any solution?  We are on AIX 6.1, Oracle 11g. environment 9.0.1.13.

[Jun 21, 2016 3:57:33 PM] com.lawson.security.authen.httpclient.LawsonHttpClient
Exception: Login Failed

[Jun 21, 2016 3:57:33 PM]       at java.lang.Throwable.(Throwable.java:67)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.security.authen.httpclient.LawsonH
ttpClientException.(LawsonHttpClientException.java:13)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.security.authen.httpclient.LawsonH
ttpClient.loginToSSOServer(LawsonHttpClient.java:374)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.security.authen.httpclient.LawsonH
ttpClient.login(LawsonHttpClient.java:363)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.security.authen.httpclient.LawsonH
ttpClient.login(LawsonHttpClient.java:128)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.netutils.ConcretePureJavaWebCl
ient.login(Unknown Source)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.coreutils.CGIInvoker.invoke(Un
known Source)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.coreutils.CGIInvoker.invoke(Un
known Source)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.coreutils.CGIInvoker.invoke(Un
known Source)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.database.dme.DmeQuery.doQuery(
Unknown Source)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.processflow.workFlow.flowGraph
.FgaProcessQuery.startActivity(Unknown Source)

[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.processflow.workFlow.flowGraph
.FgActivity.execute(Unknown Source)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.processflow.workFlow.flowGraph
.FgProcess.run(Unknown Source)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.pfengine.ProcessFlowEngine.exe
cute(Unknown Source)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.pfengine.ProcessFlowEngine.sta
rtProcessAt(Unknown Source)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.eprocessserver.KBConnection.st
artProcess(Unknown Source)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.eprocessserver.KBConnection.st
artProcess(Unknown Source)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.eprocessserver.KBConnection.ex
ecute(Unknown Source)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.eprocessserver.KBConnection.ru
n(Unknown Source)
[Jun 21, 2016 3:57:33 PM]       at com.lawson.bpm.eprocessserver.util.ThreadPool
$PooledThread.run(Unknown Source)

[Jun 21, 2016 3:57:33 PM] Error:Connection failed. Retries left: 5