[Zope] How to sort the results of portal_catalog.searchResults()???

Hi All, I would like to sort the results of portal_catalog.searchResults() based on the last_modified_date.... But it seems that, portal_catalog...is producing the results randomly.....everytime the order of the items in result list differs......... Has anybody solved this problem...??? or anyother way to overcome this problem..... Expecting replies saravanan A A.Saravanan, WundtStrasse 7,Zi:9L1, Dresden - 01217 Germany Home: 0351-7997546 Mobile: 01797395091 ___________________________________________________ Click below to experience Sooraj R Barjatya's latest offering 'Main Prem Ki Diwani Hoon' starring Hrithik, Abhishek & Kareena http://www.mpkdh.com