If I'm not completely mistaken I think that the backslash is an escape character in Perl. So if you
really mean to use it will have to escaped as well:
{\\rtf1\\ansi\\ansicpg1252\\deff0\\deflang1033{\\fonttbl{\\f0\\fswiss\\fcharset0 Arial;}}
From the look of the start of your file it seems as if your editor added some RTF tags to it. These richt text format tags mean nothing to the Perl interpreter and are absolutely superfluous. Please use another editor (I strongly recommend Notepad++) or make sure when you save your work with your editor to save in text file format only.
Best Regards,
Manfred