FXP trouble

I'm having some trouble with copying files from one folder on my server into another folder. FXP is allowed on my server. Support was able to use FXP without any problem, but for some reason I'm having a problem with it. I have the Temporary Queue and Transfer Queue set up. I then drag the file into the folder I want it to be copied in, and then I press the Start button. Nothing happens. The status just keeps on saying "Retry at whatever time". I've checked the folder and did a F5. Nothing is there. Again, I contacted support about this and they were able to do this fine. What's the problem here?