Error after Liferay install

Hello,
After installation from Liferay i get the following error message.
Show somebody what is to be done?

HTTP Status 500:

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: Exception in JSP: /index.jsp:46

43: redirect = PortalUtil.getPathMain();
44: }
45: else {
46: redirect = PortalUtil.getHomeURL(request);
47: }
48:
49: if (!request.isRequestedSessionIdFromCookie()) {

Stacktrace: org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:451) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) javax.servlet.http.HttpServlet.service(HttpServlet.java:803) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:94) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:140) com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:91) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:94) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:94) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.sharepoint.SharepointFilter.processFilter(SharepointFilter.java:193) com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:91) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.doFilter(VirtualHostFilter.java:271) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.servlet.filters.threadlocalcache.ThreadLocalCacheFilter.processFilter(ThreadLocalCacheFilter.java:55) com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:91) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:94) org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)

root cause

java.lang.NullPointerException com.liferay.portal.util.PortalImpl.getHomeURL(PortalImpl.java:937) com.liferay.portal.util.PortalUtil.getHomeURL(PortalUtil.java:297) org.apache.jsp.index_jsp._jspService(index_jsp.java:92) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) javax.servlet.http.HttpServlet.service(HttpServlet.java:803) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) javax.servlet.http.HttpServlet.service(HttpServlet.java:803) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:94) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:140) com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:91) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:94) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:94) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.sharepoint.SharepointFilter.processFilter(SharepointFilter.java:193) com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:91) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.doFilter(VirtualHostFilter.java:271) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.servlet.filters.threadlocalcache.ThreadLocalCacheFilter.processFilter(ThreadLocalCacheFilter.java:55) com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:91) com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:154) com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:94) org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)

Hi,

What is your platform and how many RAM do you have?

Hi,

The platform is Windows XP SP3 in a VMware environment.
Working memory was assigned 4 GB