FTP - file content conversion error

Hi XI experts,

I am trying to FTP a file along with using the file content conversion. This is the Audit log from cc monitoring:

Success Connect to FTP server "xxx.x.xx.xx",directory "/file/dropoff/test"

Error Attempt to process file failed with An error occurred while connecting to the FTP server 'xxx.x.xx.xx:50000'. The FTP server returned the following error message: 'com.sap.aii.adapter.file.ftp.FTPEx: The control connection to the FTP server xxx.x.xxx.xx timed out while reading the server reply.'. For details, contact your FTP server vendor.

However if I just FTP the file without using file content conversion, it works fine. I used 300 sec as the timeout parameter. Please help!! I am not sure how to proceed..

thanks,

Lasya