MicrostockGroup

I am having difficulty with the uploading of images to my port at Bigstock.  When I try to upload 10 images via the multi upload page, the connection fails after the 1st or second image.  The same things happens when I upload to BigStock using cushystock as well, just one or two images go through and the rest fail.  This doesn't happen with any of the other sites I upload to, just BigStock.  Just wondering if anyone else has had this problem and if there is a solution?
Any help would be appreciated.
Jan

Whenever I have had problems with the Multi Image Up-loader it was due to BigStock refreshing all or part of the site. Give it a half hour break and try again. Always works for me this way.

-Larry

Thank you for your replies.  I wish the solution was as easy as waiting an hour or so. This problem has been happening for about 3 weeks now.  Previously, uploading to BigStock worked well.  I haven't made any changes to my computer or internet connection, and can't work out why I'm having upload problems.  In total frustration, I emailed BigStock yesterday, so hopefully they may have a solution.  I really like BigStock, and want to build my portfolio there, but it's just so difficult to get my images uploaded at present.

Thanks Oboy,
I haven't tried uploading from someone else's computer yet, so I will give that a go and see if it makes a difference. 
I'll check cushy stock as well.
Cheers,
Jan