Error Emailing A Single Sheet From A Workbook

I have an original workbook that I use daily stored in a folder called 'Live'. I also have this same workbook saved in a different folder call 'In Progress' because I am constantly improving and making changes to it. While I'm in the revision mode, I keep it in this folder. Once I've completed my revisions, I move it to the folder where the live workbook is located and replace the old version. Therefore, I have two copies of the workbook at all times. The name of the workbook in both folders is the same (IRQT)

I have a macro in this workbook that will allow you to save a copy of the workbook in a folder called IRQTArchive. The macro will create the folder if it doesn't exist, then store a copy of the workbook using a name in a cell. After that is complete it renames the workbook back to the original name (IRQT).

This macro works perfect in my live version, but when I execute the macro in the 'In Progress' version, I get a Compile error: Sub or Function not Defined when it reads the dirExists command in the first line of code. The code in both sheets is identical. Here are the first few lines of code. The command dirExists is highlited in yellow when it errors out.