Issue with Customized Grid

[Praveen]

I did customized the radgrid so as to get the grid according to the requirement. But the Calendar Filter and pager button is not getting displayed properly.
Even after customizing, I can see the WebResource CSS in the firebug. I disabled the EmbeddedStyleSheetClass. I like to get some help on this. I will attach the screenshot for the reference. Thanks in advance.