unrecognized error message

 Can someone help me with this error message, what does it mean? We seem to
 get it everytime we connect to this one site.
 
 
ERROR

The requested URL could not be retrieved

While trying to retrieve the URL: ftp://ftp.stairways.com/stairways

The following FTP error was encountered:

       4.122.19.78, port 1819: (22) Invalid argument

This means that:

    A local socket error occurred. Please try again.

Generated Thursday, 23-Jan-97 23:18:24 GMT, by
squid-ftpget/1.1.beta28@www-cache.carroll.com

 Thanks

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