SSIS 2008: Illegal characters in path when trying to rename a file

I have a task that should rename a file I have a variable called RenameFileName \\servername\csv\BACKUP\" + (DT_WSTR,4)DATEPART("yyyy",GetDate()) + RIGHT("0" + (DT_WSTR,2)DATEPART("mm",GetDate()) ,2) + RIGHT("0" + (DT_WSTR,2)DATEPART("dd",GetDate()),2) + ".csv When I run the task I get the error Illegal characters in path Am I doing anything wrong? Below are a list of the variables I have tried \\\\servername\\csv\\BACKUP\\" + (DT_WSTR,4)DATEPART("yyyy",GetDate()) + RIGHT("0" + (DT_WSTR,2)DATEPART("mm",GetDate()) ,2) + RIGHT("0" + (DT_WSTR,2)DATEPART("dd",GetDate()),2) + ".csv \\servername\csv\BACKUP\" + (DT_WSTR,4)DATEPART("yyyy",GetDate()) + RIGHT("0" + (DT_WSTR,2)DATEPART("mm",GetDate()) ,2) + RIGHT("0" + (DT_WSTR,2)DATEPART("dd",GetDate()),2) + ".csv "\\servername\csv\BACKUP\" + (DT_WSTR,4)DATEPART("yyyy",GetDate()) + RIGHT("0" + (DT_WSTR,2)DATEPART("mm",GetDate()) ,2) + RIGHT("0" + (DT_WSTR,2)DATEPART("dd",GetDate()),2) + ".csv" "\\\\servername\\csv\\BACKUP\\" + (DT_WSTR,4)DATEPART("yyyy",GetDate()) + RIGHT("0" + (DT_WSTR,2)DATEPART("mm",GetDate()) ,2) + RIGHT("0" + (DT_WSTR,2)DATEPART("dd",GetDate()),2) + ".csv" Please note that the following works: \\\\servername\\csv\\BACKUP\\ABC.csv This however does not work \\\\servername\\csv\\BACKUP\\"+1+".csv It errors as soon a I put in double quotes. Single quotes are fine and they get put in the filename Thanks