Try to update Web.config , so force the IE Browser to work like IE7(Compatibility View).
Add This Line on the Web.config before end of </system.webServer> and start of the <system.net> :
</defaultDocument>
<httpProtocol>
<customHeaders>
<add name="X-UA-Compatible" value="IE=7" />
</customHeaders>
</httpProtocol>
</system.webServer>
<system.net>