Hi, Wendy -
Thanks for your response. I can add two web parts intermittently. Sometimes, I can add and sometimes I can't, sometimes the web part gets added but when i edit the page it becomes invisible and remains invisible thereafter.
When i put "?contents=1" in the url, i can see the web parts listed though.
The HTML form web part i use for implementing a filter. Sometimes when i edit the HTML filter web part and change the source editor, and click on save, it asks me various options, like :
1. Do you want to cancel the changes
2. Do you want to merge the changes, etc ......
I find such anomalies on wiki page from long time. I want to be sure, if this is the case only with me or most of the SharePoint users ?
I don't get any error message as such.