Hi

I used TinyMCE in my page but when I enter text on it and click on button to insert data below error happen

Server Error in '/behtop website' Application.

A potentially dangerous Request.Form value was detected from the client (TextBox1="<p><span).

Description: Request Validation has detected a potentially dangerous client input value, and processing of the request has been aborted. This value may indicate an attempt to compromise the security of your application, such as a cross-site scripting attack. To allow pages to override application request validation settings, set the requestValidationMode attribute in the httpRuntime configuration section to requestValidationMode="2.0". Example: <httpRuntime requestValidationMode="2.0" />. After setting this value, you can then disable request validation by setting validateRequest="false" in the Page directive or in the <pages> configuration section. However, it is strongly recommended that your application explicitly check all inputs in this case. For more information, see http://go.microsoft.com/fwlink/?LinkId=153133.  Exception Details: System.Web.HttpRequestValidationException: A potentially dangerous Request.Form value was detected from the client (TextBox1="<p><span). Source Error: 

[No relevant source lines]

why this happen ?

what should I do?

Best Regards

Neda