Struts Valuestack problem.....

Question

Hello... Suppose that i have this link...

http://localhost:8080/medilab/prototypes/exams/edit?exam.id=977&exam.name=bb

without exam.name=bb at the request the <s:property value="exam.name" />" will output the correct string... Otherwise this parameter gets over the object:S:S:S:@

<s:property  value="#attr.exam.name" />"
<s:property  value="exam.name" />"
....

all output bb...

What can i do for this?!