Errors.. checking the content inside href

Whenever I check my site, I get 34 Errors, and 27 warnings... That's 
good, except it's giving me errors like:
Line 61, Column 66: cannot generate system identifier for general entity 
"type"

… <a href="default.aspx?ViewDetail&type=events&id=11">

It's checking the content inside links. Why is this?

The URL is 
http://validator.w3.org/check?uri=www.eastcoastgardencenter.com%2Fnew&charset=(detect+automatically)&doctype=Inline&group=0

But it doesn't do it on my other website:
http://validator.w3.org/check?uri=http%3A%2F%2Fwww.black-crystal.net&charset=(detect+automatically)&doctype=Inline&group=0&user-agent=W3C_Validator%2F1.654

Both of them are dynamically generated by ASPNET.