new SmartFTP:upload problems

I have been using SmartFTP for long time and it is convenient and easy to use. However, I have encountered some problems while uploading my files.
Connectionto the server - ok.
I open a local browser and select a group of some 100 *.jpg files each 4-10 kB. Upload usually fails - I am able to upload a maximum of 50 files. It would not be bad, but I have to transfer some 2000 of them.
Triet to change Act/pas. modes - nothing.
Changed time - nothing.
I have a windows firewall and I don't think it is blocking SmartFTP

Please help me...

Hello ...

Do you use the Transfer Queue for your transfers? If not you should.