JSP erreur JasperException

salut,
pouvez vous svp m'aider, j'ai l'erreur suivent mais je ne sais pas d'où vient-il?
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message 
 
description Le serveur a rencontrï¿½ une erreur interne () qui l'a empï¿½chï¿½ de satisfaire la requï¿½te.
 
exception 
 
org.apache.jasper.JasperException: An exception occurred processing JSP page /association_8_maintHandlers.jsp at line 261
 
258:         //}
259:     ((Record)association_8_maintModel.getChild("association_8")).addRecordListener(new association_8_maintassociation_8RecordHandler());
260:     ((TextBox)((Record)association_8_maintModel.getChild("association_8")).getChild("ID_PROFILE")).addValidationListener(new association_8ID_PROFILETextBoxHandler());
261:         association_8_maintCntr.process();
262: %>
263:         <% request.setAttribute("HeaderParent", association_8_maintModel); %>
264:         <%{%><%@include file="/HeaderHandlers.jsp"%><%}%>
 
 
Stacktrace:
	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:505)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:416)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 
 
cause mï¿½re 
 
java.lang.RuntimeException: Unable to create connection 'Connection1' to the database.
	com.codecharge.db.PoolJDBCConnection.getConnection(PoolJDBCConnection.java:23)
	com.codecharge.db.JDBCConnection.<init>(JDBCConnection.java:85)
	com.codecharge.db.PoolJDBCConnection.<init>(PoolJDBCConnection.java:15)
	com.codecharge.db.JDBCConnectionFactory.getJDBCConnection(JDBCConnectionFactory.java:36)
	com.codecharge.db.JDBCConnectionFactory.getJDBCConnection(JDBCConnectionFactory.java:27)
	com.codecharge.RecordProcessor.select(RecordProcessor.java:268)
	com.codecharge.RecordProcessor.process(RecordProcessor.java:114)
	com.codecharge.PageProcessor.process(PageProcessor.java:30)
	com.codecharge.PageController.process(PageController.java:181)
	org.apache.jsp.association_005f8_005fmaint_jsp._jspService(association_005f8_005fmaint_jsp.java:412)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
thanks guys