Reserved.ReportViewerWebControl.axd is not found, missing part of the path

I am using the Report Viewer control version 10 in a project with framework 4, in the local machine works fine but when i do the deploy gives me an error that the Reserved.ReportViewerWebControl.axd is not found.

I try directly to use the url and i notice that is missing a part of the path.

The url that the control is using is

http://Server/part2/Reserved.ReportViewerWebControl.axd?OpType=SessionKeepAlive&ControlID=207ee04836c

Should be

http://Server/part1/part2/Reserved.ReportViewerWebControl.axd?OpType=SessionKeepAlive&ControlID=207ee04836c

I use the second and works fine

Why is lossing part of the Path