LDAP: error code 1 - Invalid query reference]; remaining name '

Question

I have the following function for a paged search operation.
Data retrieved by this function is used somewhere else to modify the Ldap Directory context.
Despite my setting for ctx and search control as "no timeout", i've been keeping thrown the exception for operations lasting more than 5 minutes(consistently) and for some short operations(sporadically):
Paged Search failed : javax.naming.NamingException: [LDAP: error code 1 - Invalid query reference]; remaining name '<directory>'
I am using DirX as LDAP directory.
Is this a time-out related exception which can be fixed in the code?
How can it be fixed?
There's no clue all over the web about this.
Thanks.
      * Returns the next page of the search results.
      * The returned result from this method can not exceed page size
      * set in the constructor.
      * @return
     public NamingEnumeration nextPage(){
          //1.step Set PagedResultsControl
          NamingEnumeration results = null;
          Control[] controls=null;          
          try {               
               if( isSearchStarted==false ){
                    isSearchStarted=true;
                    if(sortingAttributes==null)
                         controls=new Control[]{ new PagedResultsControl(pageSize) };
                    else
                         controls=new Control[]{new SortControl(sortingAttributes, Control.NONCRITICAL), new PagedResultsControl(pageSize) };
               }else {// examine the response controls
                    cookie = parseControls(ctx.getResponseControls());
                    if( cookie!=null && cookie.length!=0 ){
                         // pass the cookie back to the server for the next page
                         if(sortingAttributes==null)
                              controls=new Control[] { new PagedResultsControl(pageSize, cookie, Control.CRITICAL) };
                         else
                              controls=new Control[] {new SortControl(sortingAttributes, Control.NONCRITICAL), new PagedResultsControl(pageSize, cookie, Control.CRITICAL) };
                    }else{
                         //search is finished
                         return null;
               ctx.setRequestControls(controls);
               //ctx.getEnvironment().values();
               //ctx.getEnvironment().put("com.sun.jndi.ldap.connect.timeout", "5000", 300000);
               ctx.addToEnvironment("com.sun.jndi.ldap.connect.timeout", "0");
               //ctx.getEnvironment().values();
          } catch (NamingException e) {
               Tracer.getInstance().error("Paged Search failed while setting response controls: " + e);
               return null;
          } catch (Exception e) {
               Tracer.getInstance().error("Paged Search failed while setting response controls: " + e);
               return null;
          //2.step: DO SEARCH
          for(int i=0;i<10;i++){
               boolean reconnect=false;
               try{     
                    results = ctx.search(searchBase, searchFilter, searchCtls);
                    Thread.sleep(300000);
                    //ctx.get
                    //Thread.sleep(300000);
                    break;
               } catch (NamingException e) {
                    Tracer.getInstance().error("Paged Search failed : " + e);
                    reconnect=true;                    
               } catch (Exception e) {
                    reconnect=true;
                    Tracer.getInstance().error("Paged Search failed : " + e);                    
               if(reconnect){
                    try {
                         this.ctx = LDAPServer.getInstance().getDirContext();
                         ctx=ctx.newInstance(controls);
                         //ctx.getEnvironment().values();
                    } catch (NamingException e1) {
                         Tracer.getInstance().error("Could not reconnect the ldapcontext");
          return results;
     }

Answer 1

It turned out to be a DirX "root DSE" entry "PAGP" that is disposing my paged results if a timeout occurs(300 seconds by default).
So i have to modify this entry during runtime, which is unfortunately only can be accesed by dirxadm.exe.
Is it possible to modify this attribute by a ldap context method?