Media Uploader playing up – problems

HI,

I’ve managed to only upload 3 jpegs into the gallery using the media uploader. 2 worked using the multifile uploader, 1 worked with browser uploader. Then now, nothing is uploading. All files are less than 1MB to say, 3MB. I’m getting no error message – it’s just not doing anything.

Anyone know why? my internet connection is strong.