ftp list

I have created a conn to the FTP and initialized it as per code. When I do the ftplist command, sometimes it works and lists the files, sometimes not. The conn is closed after each listing and is initialized when required in the code. Seems to fail if I hit back button, wait a moment, then...

Hi, I am trying to use the Erel's tutorial for FTP Client using Net library (https://www.b4x.com/android/forum/threads/android-ftp-tutorial.10407/#content). The List function runs fine when i am connected by Wifi to the server, but it hangs without any message when i use gsm only without wifi...