session time out

I've been uploading / download by ftp for weeks with no problem. Now I'm having problems with SmartFTP.

I keep getting 'lost connections' and sometimes I will transfer a small file and it willn't transfer the whole file.

Example: test.php (24k) will transfer and for a very short time I will see 24k on the server and then within a sec it will be 2k or even 0 K

Has anyone else had similar problems?

Thanks,