Have a look at the supplied SAS DOC link - there are special considerations using DBMS=EXCEL to consider (LIBNAME statement, not FILENAME). Also, one will assume that there is at least one blank character between "Fred01" and "outfile=".
Lastly, you may want to start simple with a DATA step to "output" a sequential file to the remote/foreign FTP destination -- just to verify whether the problem is related to your FTP authority (at the remote host) or some issue with PROC EXPORT. First though, you need to review the DOC and find/resolve suitable compatibility issues with your code. Also, there are technotes and technical papers (SUGI, SGF) at the SAS support website
http://support.sas.com/ for reference.
Scott Barry
SBBWorks, Inc.