DVT component refresh issue

Question

I am using 11g release2(11.1.2.0.0).I have a dvt scheduling gantt component based on collection model,I maintain my data structure as treemodel.
I added a functionality to the gantt, a input date component and a refresh button which retrieves data for the input date range.It works fine upto here.
Now,There is a read only table on the page too,in a different region,I have a print functionality for it.When i press print,a new tab is opened in the browser.After this,the refresh gantt stops working,Pressing the refresh buttion just ppr's the same page again.
Same case is reproducible on browser refresh also.
Could I please get some suggestions for this.If needed I will prepare a demo test case and upload it.
Regards

Answer 1

Bean code for LOV:
public List<SelectItem> getAvailableBusinessUnits() {
DCIteratorBinding buIter =
ADFUtils.findIterator("GmBusinessUnitVO1Iterator");
ViewCriteria vc =
buIter.getViewObject().getViewCriteriaManager().getViewCriteria("ActiveGmBusinessUnitVC");
buIter.getViewObject().getViewCriteriaManager().applyViewCriteria(vc);
buIter.getViewObject().executeQuery();
if (availableBusinessUnits == null) {
availableBusinessUnits =
ADFUtils.selectItemsForIterator("GmBusinessUnitVO1Iterator",
"GmBusinessUnitId",
"BusinessUnitName");
return availableBusinessUnits;
Bean code for the shuttle box:
public void buCountryList(ValueChangeEvent valueChangeEvent) {
// Add event code here...
buId = valueChangeEvent.getNewValue().toString();
DCIteratorBinding countryList =
ADFUtils.findIterator("CountryOfVehSalesBasedLOVOnBUSecurityVO1Iterator");
countryList.getViewObject().ensureVariableManager().setVariableValue("business_unit",
buId);
countryList.getViewObject().executeQuery();
Thanks
Abhishek