Problem with uploading a large number of files

I have a few sites with thousands of pages more and less each. I can never do a simple upload.

BUT WHY?

As long as I upload one or a few files it is OK but it never does the whole job in one attempt.

I am going to follow your kind suggestions and get back to you with the error I get.

At the moment upload has stopped without any error showing. It has just stopped.

Use the Global Queue as suggested numerous times in this forum.
-Mat

Thanks mb

It is working fine.

Now first problem

After using global queue for a few time successfully I got into problem again.

At the moment I can upload files the normal way but I can't use global queue. Status of files constantly change from waiting to connecting again and again without one single upload.