Asp.Net website link when clicked from Word document throws runtime error

[raymondx3]

We are facing a strange error. I have an asp.net4.0 website which is running fine. But if someone put it's link in a word document and clicks first time it works but when clicked second time it throws runtime error.=============== Application Warning ==========Event code: 3003 Event message: A validation error has occurred. Event time: 9/27/2012 5:11:47 PM Event time (UTC): 9/27/2012 10:11:47 PM Event ID: 17a66c61de004c17a6d562fc7b355ac1 Event sequence: 4 Event occurrence: 1 Event detail code: 0 Application information: Application domain: /LM/W3SVC/3/ROOT-2-129932570396136079 Trust level: Full Application Virtual Path: / Application Path: E:\Inetpub\wwwroot\ Machine name: NDDVDXWEBAPP01Exception informationException information: Exception type: HttpRequestValidationException Exception message: A potentially dangerous Request.Form value was detected from the client ===================================================================I am not able to conclude the reason behind this issue.Thanks in advance!