I can't execute class Tester.java in ZimbraServer from package Franklin-5010

this is the error:

[] WARN: local config file `/opt/zimbra/conf/localconfig.xml' is not readable
connecting to https://mail.example.com:7071/service/admin/soap/ as admin with password krukko
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderE xception: unable to find valid certification path to requested target
at com.sun.net.ssl.internal.ssl.Alerts.getSSLExceptio n(Alerts.java:150)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(S SLSocketImpl.java:1518)
at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Ha ndshaker.java:174)
at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Ha ndshaker.java:168)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.serv erCertificate(ClientHandshaker.java:848)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.proc essMessage(ClientHandshaker.java:106)
at com.sun.net.ssl.internal.ssl.Handshaker.processLoo p(Handshaker.java:495)
at com.sun.net.ssl.internal.ssl.Handshaker.process_re cord(Handshaker.java:433)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRec ord(SSLSocketImpl.java:818)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.perform InitialHandshake(SSLSocketImpl.java:1030)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.writeRe cord(SSLSocketImpl.java:622)
at com.sun.net.ssl.internal.ssl.AppOutputStream.write (AppOutputStream.java:59)
at java.io.BufferedOutputStream.flushBuffer(BufferedO utputStream.java:65)
at java.io.BufferedOutputStream.flush(BufferedOutputS tream.java:123)
at org.apache.commons.httpclient.methods.StringReques tEntity.writeRequest(StringRequestEntity.java:150)
at org.apache.commons.httpclient.methods.EntityEnclos ingMethod.writeRequestBody(EntityEnclosingMethod.j ava:495)
at org.apache.commons.httpclient.HttpMethodBase.write Request(HttpMethodBase.java:1973)
at org.apache.commons.httpclient.HttpMethodBase.execu te(HttpMethodBase.java:993)
at org.apache.commons.httpclient.HttpMethodDirector.e xecuteWithRetry(HttpMethodDirector.java:397)
at org.apache.commons.httpclient.HttpMethodDirector.e xecuteMethod(HttpMethodDirector.java:170)
at org.apache.commons.httpclient.HttpClient.executeMe thod(HttpClient.java:396)
at org.apache.commons.httpclient.HttpClient.executeMe thod(HttpClient.java:324)
at com.zimbra.common.soap.SoapHttpTransport.invoke(So apHttpTransport.java:242)
at com.zimbra.common.soap.SoapHttpTransport.invoke(So apHttpTransport.java:216)
at com.zimbra.common.soap.SoapTransport.invoke(SoapTr ansport.java:315)
at com.zimbra.common.soap.SoapTransport.invoke(SoapTr ansport.java:279)
at com.zimbra.cs.client.soap.LmcSoapRequest.invoke(Lm cSoapRequest.java:142)
at com.zimbra.cs.client.soap.Tester.main(Tester.java: 508)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderE xception: unable to find valid certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(PKIXV alidator.java:221)
at sun.security.validator.PKIXValidator.engineValidat e(PKIXValidator.java:145)
at sun.security.validator.Validator.validate(Validato r.java:203)
at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl. checkServerTrusted(X509TrustManagerImpl.java:172)
at com.sun.net.ssl.internal.ssl.JsseX509TrustManager. checkServerTrusted(SSLContextImpl.java:320)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.serv erCertificate(ClientHandshaker.java:841)
... 23 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderE xception: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder. engineBuild(SunCertPathBuilder.java:236)
at java.security.cert.CertPathBuilder.build(CertPathB uilder.java:194)
at sun.security.validator.PKIXValidator.doBuild(PKIXV alidator.java:216)
... 28 more


Why local config file `/opt/zimbra/conf/localconfig.xml' is not readable?
I have my zimbra server on machine 192.168.168.196 on Ubuntu 8_04 Server in my local machine, while source files are on machine 192.168.168.179 on mac os x 10.5 client. I launch Tester.java from Eclipse.