[Zope] CMF Portal Catalog issue(Please Reply urgently)

Hello, I have a problem with ZCatalog in my CMF site. Lately i checked that the objects indexed by Portal_Catalog has increased by a very large extent. When i checked i found that the Portal Catalog has started indexing the python sripts and Page Template files which form a part of the code for my site. I dont know why these entries have started coming up. Any ideas Regards, Yaser