I am still testing more than a week. In SharePoint 2010 it is not working.

There is a problem when I insert in the datasource

<WebPartPages:dataformparameter
PropertyName="ParameterValues" ParameterKey="SearchQS" DefaultValue=""
Name="SearchQS">
PropertyName="ParameterValues" ParameterKey="_1"
DefaultValue="<Where><Or><Or><Or><BeginsWith><FieldRef Name='Title'/><Value
Type='Text'>" Name="_1">

this. The server don't like. I don't know if its the script manager or the kind of how I handle the datasource for this example?

I hope some of you can help me...?