c# - ReportViewer cutting off top of report when zoomed -

we have report running out of sql server reporting services works fine. when zoomed 150% looks correct. (seen here http://i.imgur.com/peebjyx.png)

i built asp.net page display report using reportviwer. displays report fine , works (seen here http://i.imgur.com/gn0ybtl.png)

the problem can't zoom in. zooms in weird , cuts off top of page (seen here http://i.imgur.com/dn5uxga.png).

here reportviewer code in aspx page.

<rsweb:reportviewer id="reportviewer1" runat="server" processingmode="remote" sizetoreportcontent="true"></rsweb:reportviewer> 

here end c# code

void renderreport()         {             //string sitename = getcurrentsitenamefromsiteid((int)session["siteid"]);             int siteid = (int)session["siteid"];             uri reporturi = new uri(webconfigurationmanager.appsettings["reportserveruri"]);             reportviewer1.processingmode = processingmode.remote;             reportviewer1.serverreport.reportserverurl = reporturi;             reportviewer1.serverreport.reportpath = @"/calendarized utility report/calendarized utility report";             reportparameter rpsite = new reportparameter("siteid", siteid.tostring());             rpsite.visible = false;             reportparameter rpyear = new reportparameter("year", year); //siteid.tostring());             rpyear.visible = false;             reportparameter rpmonth = new reportparameter("month", month); //siteid", siteid.tostring());             rpmonth.visible = false;               reportviewer1.serverreport.setparameters(rpsite);             reportviewer1.serverreport.setparameters(rpyear);             reportviewer1.serverreport.setparameters(rpmonth);          } 

is there parameter missing allow me zoom in correctly? i'm not using css or anything.

thanks

edit: both using report viewer 2012, version=11.0.3000.0 of microsoft reporting , viewing site in ie 10. works fine in chrome.