Modify Upload Code Make Firefox Work

Hi Looking to have a programmer modify some code for me, the code uploads a file ok in IE, but in Firefox i get the following error. Could not find file Could not find file 'C:[login to view URL]'.So the code attached is very easy for a professional programmer to modify so that it works if a visitor tries to upload a file using Firefox by using [login to view URL] The budget for this is $30 dollars and need to be completed within a day. George