URL Parameter double using Jump to URL option

Hello,

I designed a report and used "jump to URL" to jump to an external site. The url get a parameter and look likehttp://mysite.com/my.aspx?ID=1

This work fine if I test the report in the report builder.

Now i take the .rdl and put it on a report server to get access over web.

The report is generated but the url parameter looks like http://mysite.com/my.aspx?ID=1&ID=1

I don´t know where the second "ID" is coming from.

I tried an other parameter like http://mysite.com/my.aspx?test=mytest and the result is http://mysite.com/my.aspx?test=mytest&test=mytest

If I don´t set an url parameter the url works fine.

Any hints?