XI Polling problem

Hi ,

We have facing some strange problem in one of our communication channels,

In which we are connecting to remote server using FTP (in File Adapter).

Problem:

when I activate the Communication channel XI polling is doing fine(polling Intercal 1 sec,but I tried with 2,3,5 sec), after sometime its connecting to FTP server but its not polling (not placing and picking up the file from remote server).Again If I activate the Communication channel its working fine.Each time I am facing this proble,even I have cleared

cache ,still I am facing the problem.

I tried with both the Connect mode(Permanantly and Per File Transfer) but result

is the same.

Can any body suggest

your Input will be appreciated.