To check for the existence of a directory using Dir, you need to specify vbDirectory as the second argument, as in something like:
If Dir("C:\2013 Recieved Schedules" & "\" & client, vbDirectory) = "" Then
Note that, with vbDirectory, Dir will return a non-empty string if the specified path already exists as a directory or as a file (provided the file doesn’t have any of the read-only, hidden, or system attributes). You could use GetAttr to be certain it’s a directory and not a file.