SSIS Package ForEach Loop Filename Returns First Character

I have created an SSIS package with a ForEach Loop which processes my files correctly. I am using a Data Flow Task to process the files. The problem is that I need to insert the Filename. I am using a Flat File Source. I right clicked and populated the FileNameColumnName property. It will only insert the first character of the filename string. I have found plenty of post stating this should work without a hitch. That is not the case for me. I am at a loss. Any help would be appreciated. I cannot use scripting.