admin login fails | Bonitasoft Community

Hi I am using BOS 5.10 with Tomcat 60..35. After starting services when I try to login on to the admin panel it gives me HTTP Status 500 error:
The full trace from log is as below: Any help appreciated.

May 16, 2016 5:07:53 AM org.ow2.bonita.util.AccessorUtil resetContext
INFO: Property: org.ow2.bonita.api-type has not been specified for api-type. Trying to autodetect it.
May 16, 2016 5:07:54 AM org.ow2.bonita.util.AccessorUtil resetContext
INFO: org.ow2.bonita.util.AccessorUtil called from server side. Using Standard context.
May 16, 2016 5:07:54 AM org.ow2.bonita.env.BonitaEnvironmentParser getInstance
INFO: parsing bindings from resource url: jar:file:/ppss/products/ipsd/BOS-5.10-Tomcat-6.0.35/lib/bonita/bonita-server-5.10.jar!/bonita.wire.bindings.xml
May 16, 2016 5:07:54 AM org.ow2.bonita.util.Misc showProblems
SEVERE: fatal-error : Content is not allowed in prolog. [line=1 column=1 ]: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Content is not allowed in prolog.. Cause: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Content is not allowed in prolog.
May 16, 2016 5:07:54 AM org.ow2.bonita.util.Misc showProblems
SEVERE: error : couldn't parse xml document [line=1 column=1 ]: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Content is not allowed in prolog.. Cause: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Content is not allowed in prolog.
May 16, 2016 5:07:54 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet org.bonitasoft.console.security.server.CredentialsEncryptionServlet/security/credentialsencryption threw exception
org.ow2.bonita.util.BonitaRuntimeException: Bonita Error: bp_Pa_1
errors during parsing of environment:
fatal-error : Content is not allowed in prolog. [line=1 column=1 ]: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Content is not allowed in prolog.
error : couldn't parse xml document [line=1 column=1 ]: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Content is not allowed in prolog.

at org.ow2.bonita.util.Misc.showProblems(Misc.java:1975)
at org.ow2.bonita.env.BonitaEnvironmentParser.parseEnvironmentFactoryFromXmlString(BonitaEnvironmentParser.java:88)
at org.ow2.bonita.env.GlobalEnvironmentFactory.getEnvironmentFactory(GlobalEnvironmentFactory.java:112)
at org.ow2.bonita.facade.APIInterceptor.invoke(APIInterceptor.java:186)
at com.sun.proxy.$Proxy2.generateTemporaryToken(Unknown Source)
at org.bonitasoft.console.security.server.api.impl.CredentialsEncryptionAPIImpl.generateTemporaryToken(CredentialsEncryptionAPIImpl.java:157)
at org.bonitasoft.console.security.server.CredentialsEncryptionServlet.doPost(CredentialsEncryptionServlet.java:127)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.bonitasoft.forms.server.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:122)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.bonitasoft.console.security.SessionFixationValve.invoke(SessionFixationValve.java:77)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:745)