Trouble setting up xWiki with SQL Server

Hi, I am trying to get XWiki installed with SQL Server for the first time. When I try to access WebHome...it gives me this error javax.servlet.ServletException: Error number 3 in 0: Could not initialize main XWiki context Wrapped Exception: Error number 3201 in 3: Exception while saving document XWiki.XWikiUsers Wrapped Exception: Error number 3221 in 3: Exception while saving class XWiki.XWikiUsers Wrapped Exception: Error number 3222 in 3: Exception while saving class XWiki.XWikiUsers Wrapped Exception: JDBC rollback failed org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:516) org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:423) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:226) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164) org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:397) javax.servlet.http.HttpServlet.service(HttpServlet.java:689) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:127 Please help. Thanks in advance Renny