Filter Data based on User Input

Hi, I have simple question...I'm trying create little script where I will be able filter based on user input. For example I have column L (Order Date), when I run macro input box will show up so user can add date. When user type in date, all data that are equal or less then user input will be deleted.

So if, Filter all date that are less or equal ##/##/##, I got following code but when I run it it does not filter my data. Can anybody tell me what I'm doing wrong in here or can somebody tell how would I do this?

HTML Code: 

Thanks a lot

Hey, I found issue why did not filtered for me, I had one of the column selected in order to Unfreeze Panes.

Now, how can I deleted all filtered row, without deleting data that are not filltered?

Thanka a lot.

Thanks a lot, work perfectly