Running into issues with website usine reserved name

I am trying to automate a website. I have it almost figured out. I am running into a problem.

First, I am trying to populate a field that has a name of fileName.
Here is the source code for the line:
<input type=file name=fileName><br>

Here is what I keep trying to enter

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but the developer keeps changing it to (notice the capitalazation in fileName):

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How can I work around this?

Thanks
Bruce

Ben, fileName is the name of a varible on a webpage(which I cannot change), it is my understanding that I have to use that EXACT spelling (including case). when working with webpage varibles.

Would file_Name be equal to "fileName"? I never heard that. (but then there has been LOTS of stuff I have learned)
I don't want to modify my code unless I am certain (lots of things depend on that varible name....)


Thanks
Bruce