infact i was filtering the records also with passing the directory information as
/tellinshare/sms/sdu/record/billrpt/eppc200710*.txt
but it was not responding but now i resolve the problem and now it's giving me the filtered file names.
The problem was, the systems are behind the firewall so i after connect and login i have to change the ConnectMode property to Active then i got the list of files, otherwise it was not responding.
Thanks