After the progress bar indicated that the upload is complete, simply press the Send button, and you will not see any Still working or Sending Messages because the file upload is already complete.
Wait until the files are getting uploaded, this may take some time depending on your Internet connection upload speed and the file size.
We recommend to install Flash Player for your Web Browser and then monitor the progress of your file upload using this flash progress bar as seen below: There is a flash based progress bar for the file upload which is visible in the browsers which have Flash Player Installed and enabled. As soon as you attach a file to Gmail and before pressing the send button, the file upload starts to the Gmail server. The fix for this is nothing else then a default feature of the Gmail. In this article we will tell you a trick with which you can avoid this confusion. During this time, when you see the message of Still Working or Sending, the files are actually getting uploaded from your computer to the Gmail server which takes time. The status you see like the one above may stay there for a few minutes. It may seem to you that it is some problem with the Gmail, but in real, this is a problem with either slow internet connectivity or poor upload speeds in certain cases.
On the top of the Gmail Windows in my web browser, it will display message like “Sending” or “Still working” as seen below: Sometimes I observe that it takes a long time to send emails with attachments. I use Gmail a lot and send email attachment via mails at times.