[jboss-dev-forums] hibernate exception

Hello, I have a portlet that connection to MsSql server via hibernate but time of this query is very long and at last i see exception on my page. In portal-sqlserver-ds.xml i locate this code: Code: <max-pool-size>200</max-pool-size> <min-pool-size>1</min-pool-size> <idle-timeout-minutes>100</idle-timeout-minutes> but yet i see this exception: javax.servlet.ServletException: Transaction is not active: tx=TransactionImpl:XidImpl[FormatId=257, GlobalId=portalserver/4717, BranchQual=, localId=4717] org.jboss.portal.server.servlet.PortalServlet.doGet(PortalServlet.java:214) javax.servlet.http.HttpServlet.service(HttpServlet.java:697) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.ja va:81) If you have solution for this problem please help me. thanks