Checkbox getting toggled on ctrl+spacebar

I've started working on an application which is being developed in ASP.Net MVC2 for Azure.

The checkboxes present in the form are not 开发者_开发百科toggling state on spacebar as they are supposed to but on ctrl+spacebar (in internet explorer). When i use internet explorer for doing the same operation on some form on the internet spacebar works fine.

Why is my app behaving differently then. I am including jQuery classes for some UI effects too.

Thanks,

Abhishek