Created Unassigned: Slider Handle seems to be disabled [27433]

Hi,

I have added the Extended Slider's dynamically from code behind. And I am getting the following errors:
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"Sys.ArgumentException: Sys.ArgumentException: Please set valid values for the height and width attributes in the slider's CSS classes Parameter name: element size"

Although Slider renders fine and works perfectly fine on IE but not on Firefox and Chrome in these both browsers I simply can't change position of handle by clicking on the rail.

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Any ideas what to do. I have already followed the following articles as well.

https://ajaxcontroltoolkit.codeplex.com/workitem/24421
https://ajaxcontroltoolkit.codeplex.com/workitem/27121

Thanks,

Attiqe